EMT Practice Test

1. Question Content...

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Question1: A customer has set up multiple VPCs for Dev, Test, Prod, and Management. You need to set up AWS Direct Connect to enable data flow from on-premises to each VPC. The customer has monitoring software running in the Management VPC that collects metrics from the instances in all the other VPCs. Due to budget requirements, data transfer charges should be kept at minimum.
Which design should be recommended?

Question2: An organization is migrating its on-premises applications to AWS by using a lift-and-shift approach, taking advantage of managed AWS services wherever possible. The company must be able to edit the application code during the migration phase. One application is a traditional three-tier application, consisting of a web presentation tier, an application tier, and a database tier. The external calling client applications need their sessions to remain sticky to both the web and application nodes that they initially connect to.
Which load balancing solution would allow the web and application tiers to scale horizontally independent from one another other?

Question3: Your company uses an NTP server to synchronize time across systems. The company runs multiple versions of Linux and Windows systems. You discover that the NTP server has failed, and you need to add an alternate NTP server to your instances.
Where should you apply the NTP server update to propagate information without rebooting your running instances?

Question4: You have been asked to monitor traffic flows on your Amazon EC2 instance. You will be performing deep packet inspection, looking for atypical patterns.
Which tool will enable you to look at this data?

Question5: Your company operates a single AWS account. A common services VPC is deployed to provide shared services, such as network scanning and compliance tools. Each AWS workload uses its own VPC, and each VPC must peer with the common services VPC. You must choose the most efficient and cost effective approach.
Which approach should be used to automate the required VPC peering?

Question6: Refer to the image.

You have three VPCs: A, B, and C.
VPCs A and C are both peered with VPC B.
The IP address ranges are as follows:
VPC A: 10.0.0.0/16
VPC B: 192.168.0.0/16
VPC C: 10.0.0.0/16
Instance i-1 in VPC A has the IP address 10.0.0.10. Instance i-2 in VPC C has the IP address 10.0.0.10. Instances i-3 and i-4 in VPC B have the IP addresses 192.168.1.10 and 192.168.1.20, respectively, i-3 and i-4 are in the subnet 192.168.1.0/24.
i-3 must be able to communicate with i-1
i-4 must be able to communicate with i-2
i-3 and i-4 are able to communicate with i-1, but not with i-2.
Which two steps will fix this problem? (Select two.)

Question7: A company has a hybrid IT architecture with two AWS Direct Connect connections to provide high availability. The services hosted on-premises are accessible using public IPs, and are also on the 172.16.0.0/16 range. The AWS resources are on the 192.168.0.0/18 range. The company wants to use Amazon Elastic Load Balancing for SSL offloading, health checks, and sticky sessions.
What should be done to meet these requirements?

Question8: A company's network engineer needs to evaluate and monitor DNS traffic The company uses Amazon Route 53 as the DNS service for its public hosted zone All DNS queries must be captured for future analysis.
What should the network engineer do to meet these requirements?

Question9: You have two placement groups in a VPC. What communication speed can be expected between the two placement groups?
Choose the correct answer:

Question10: An organization wants to process sensitive information using the Amazon EMR service. The information is stored in on-premises databases. The output of processing will be encrypted using AWS KMS before it is uploaded to a customer-owned Amazon S3 bucket. The current configuration includes a VPS with public and private subnets, with VPN connectivity to the on-premises network. The security organization does not allow Amazon EC2 instances to run in the public subnet.
What is the MOST simple and secure architecture that will achieve the organization's goal?

Question11: A Systems Administrator is designing a hybrid DNS solution with spilt-view. The apex-domain
"example.com" should be served through name servers across multiple top-level domains (TLDs). The name server for subdomain "dev.example.com" should reside on-premises. The administrator has decided to use Amazon Route 53 to achieve this scenario.
What procedurals steps must be taken to implement the solution?

Question12: You work for a company that has several instances running with automatically assigned public IPs. You performed an upgrade that required you to restart the instances from the console and your DNS records don't work anymore. What happened? Choose the correct answer:

Question13: Your company just purchased a domain using another registrar and wants to use the same nameservers as your current domain hosted with AWS. How would this be achieved? Choose the correct answer:

Question14: Each custom AWS Config rule you create must be associated with a(n) AWS ____, which contains the logic that evaluates whether your AWS resources comply with the rule.

Question15: An organization runs a consumer-facing website on AWS. The Amazon EC2-based web fleet is load balanced using the AWS Application Load Balancer, Amazon Route 53 is used to provide the public DNS services.
The following URLs need to server content to end users:
test.example.com
web.example.com
example.com
Based on this information, what combination of services must be used to meet the requirement? (Select two.)

Question16: You are preparing to launch Amazon WorkSpaces and need to configure the appropriate networking resources. What must be configured to meet this requirement?

Question17: An organization delivers high-resolution, dynamic web content. Internet users access the content from a variety of platforms, including mobile, tablet and desktop. Each platform receives a customized experience to account for the differences in viewing modes. A dedicated, automatic- scaling fleet of Amazon EC2 instances is used for each platform to server content based on path- based headers.
Which combination of services will MINIMIZE cost and MAXIMIZE performance? (Select two.)

Question18: An organization wants to process sensitive information using the Amazon EMR service. The information is stored in on-premises databases. The output of processing will be encrypted using AWS KMS before it is uploaded to a customer-owned Amazon S3 bucket. The current configuration includes a VPS with public and private subnets, with VPN connectivity to the on-premises network. The security organization does not allow Amazon EC2 instances to run in the public subnet.
What is the MOST simple and secure architecture that will achieve the organization's goal?

Question19: You have two VPCs that require DNS resolution from your on-premises data center. You want to have a DNS server in the cloud, but you don't want to have multiple DNS servers What two steps should you take?
Choose the 2 correct answers:

Question20: Your company has two DX locations. You need to configure one link as passive. What should you configure in your router to set that link as the passive link.
Choose the correct answer:

Question21: Your company currently has a LAG to AWS with two 1Gbps connections. What is the best way to increase throughput on this LAG?
Choose the correct answer:

Question22: An organization is migrating its on-premises applications to AWS by using a lift-and-shift approach, taking advantage of managed AWS services wherever possible. The company must be able to edit the application code during the migration phase. One application is a traditional three-tier application, consisting of a web presentation tier, an application tier, and a database tier. The external calling client applications need their sessions to remain sticky to both the web and application nodes that they initially connect to.
Which load balancing solution would allow the web and application tiers to scale horizontally independent from one another other?

Question23: A network engineer deploys an application in a private subnet in a VPC that connects to many external video feed providers using RTMP over the internet. A NAT gateway has been deployed in a public subnet and is working as expected. From the Amazon EC2 instance, the application is able to connect to all feed providers except one, which hangs when connecting. Manually testing a connection from an Amazon EC2 instance in the public subnet to the problem feed indicates that the feed works as expected.
What is causing this issue?

Question24: Your organization leverages an IP Address Management (IPAM) product to manage IP address distribution.
The IPAM exposes an API. Development teams use CloudFormation to provision approved reference architectures. At deployment time, IP addresses must be allocated to the VPC. When the VPC is deleted, the IPAM must reclaim the VPC's IP allocation.
Which method allows for efficient, automated integration of the IPAM with CloudFormation?

Question25: An application runs on a fleet of Amazon EC2 instances in a VPC. All instances can reach one another using private IP addresses. The application owner has a new requirement that the domain name received via DHCP should be different for a particular set of instances that are currently in one particular subnet.
What changes should be made to meet this requirement while continuing to support the existing application requirements?

Question26: A bank built a new version of its banking application in AWS using containers that content to an on-premises database over VPN connection. This application version requires users to also update their client application. The bank plans to deprecate the earlier client version. However, the company wants to keep supporting earlier clients through their on-premises version of the application to serve a small portion of the customers who haven't yet upgraded.
What design will allow the company to serve both newer and earlier clients in the MOST efficient way?

Question27: When an AWS Config rule is triggered a JSON object known as an AWS Config Event is created.
This object contains a(n) ____ attribute, which is a JSON-formatted set of key/value pairs the receiving AWS Lambda function processes as part of its evaluation logic.

Question28: What port and protocol is used by DNS?
Choose the correct answer:

Question29: An AWS Config rule can be set to be evaluated if a certain set of resources undergoes a configuration change. The set of resources to which the rule applies can be restricted by the rule's ____, which can include a combination of a resource type and a resource ID, for example.

Question30: A Network Engineer is provisioning a subnet for a load balancer that will sit in front of a fleet of application servers in a private subnet. There is limited IP space left in the VPC CIDR. The application has few users now but is expected to grow quickly to millions of users.
What design will use the LEAST amount of IP space, while allowing for this growth?

Question31: An organization processes consumer information submitted through its website. The organization's security policy requires that personally identifiable information (PII) elements are specifically encrypted at all times and as soon as feasible when received. The front-end Amazon EC2 instances should not have access to decrypted PII. A single service within the production VPC must decrypt the PII by leveraging an iAM role.
Which combination of services will support these requirement? (Select two.)

Question32: A logistics company has deployed a hybrid environment that has multiple VPCs in both the us-east-1 Region and the af-south-1 Region The on-premises data center is connected to us-east-1 through an AWS Direct Connect connection The Direct Connect connection is connected to a Direct Connect gateway that is associated with a transit gateway The transit gateway is attached to all the VPCs in us-east-1 An application that is deployed in af-south-1 requires access to a database in the data center The application also requires access to file storage in a VPC in us-east-1 Which solution will meet these requirements with the LOWEST latency?

Question33: You have just deployed a website that utilizes CloudFront, ELB, and S3 to serve content. When users access your site, they are seeing broken image links. You know you configured CloudFront to use cdn.yourdomain.com. What is the most likely reason why your users not seeing the images?
Choose the correct answer:

Question34: To directly manage your CloudTrail security layer, you can use ____ for your CloudTrail log files.

Question35: An organization is using a VPC endpoint for Amazon S3. When the security group rules for a set of instances were initially configured, access was restricted to allow traffic only to the IP addresses of the Amazon S3 API endpoints in the region from the published JSON file. The application was working properly, but now is logging a growing number of timeouts when connecting with Amazon S3. No internet gateway is configured for the VPC.
Which solution will fix the connectivity failures with the LEAST amount of effort?

Question36: A corporate network routing table contains 624 individual RFC 1918 and public IP prefixes. You have two AWS Direct Connect connectors. You configure a private virtual interface on both connections to a virtual private gateway. The virtual private gateway is not currently attached to a VPC. Neither BGP session will maintain the Established state on the customer router. The AWS Management Console reports the private virtual interfaces as Down.
What could you do to address the problem so that the AWS Management Console reports the private virtual interface as Available?

Question37: You have a global corporate network with 153 individual IP prefixes in your internal routing table.
You establish a private virtual interface over AWS Direct Connect to a VPC that has an Internet gateway (iGW). All instances in the VPC must be able to route to the Internet via an IGW and route to the global corporate network via the VGW.
How should you configure your on-premises BGP peer to meet these requirements?

Question38: A company is connecting to a VPC over an AWS Direct Connect using a private VIF, and a dynamic VPN connection as a backup. The company's Reliability Engineering team has been running failover and resiliency tests on the network and the existing VPC by simulating an outage situation on the Direct Connect connection. During the resiliency tests, traffic failed to switch over to the backup VPN connection.
How can this failure be troubleshot?

Question39: You are your company's AWS cloud architect. You have created a VPC topology that consists of
3 VPCs. You have a centralised VPC (VPC-Shared) that provides shared services to the remaining 2 departmental dedicated VPCs (VPC-Dept1 and VPC-Dept2). The centralised VPC is VPC peered to both of the departmental VPCs, that is a VPC peering connection exists between VPC-Shared and VPC-Dept1, and a VPC peering connection exists between VPC-Shared and VPC-Dept2.
Select the correct option from the list below.

Question40: An organization will be expanding its current network design. When fully built out, there will be 99 VPCs spread across 11 AWS accounts (9 VPCs per account). There is currently an AWS Direct Connect connection into one account with 9 VPCs, each with a virtual network interface (VIF) per VPC.
Which of the following designs will minimize cost while allowing the organization to expand?

Question41: AWS CloudTrail can be configured to ____ log files across multiple accounts and regions so that log files are delivered to a single bucket.

Question42: DNS name resolution must be provided for services in the following four zones:
company.private.
emea.company.private.
apac.company.private.
amer.company.private.
The contents of these zones is not considered sensitive, however, the zones only need to be used by services hosted in these VPCs, one per geographic region. Each VPC should resolve the names in all zones.
How can you use Amazon route 53 to meet these requirements?

Question43: A company wants to conduct a proof of concept for an SAP HANA application with a hey objective to automate the provisioning of infrastructure and the application. The company operates a hybrid cloud infrastructure with AWS Direct Connect between its data center and VPC. Security policy dictates that all traffic from AWS be routed through on-premises data center firewalls. Security policy also prohibits the use of a VPC internet gateway for internet access The company enforces use of a forward proxy server for all outbound network traffic All resources inside the VPC are able to reach on-premises servers.
All Amazon EC2 Linux instances require package updates over the internet. However, the updates are failing and sending errors.
What would cause these errors?

Question44: Which statement about VPC endpoints is incorrect?
Choose the correct answer:

Question45: An organization has three AWS accounts with each containing VPCs in Virginia, Canada and the Sydney regions. The organization wants to determine whether all available Elastic IP addresses (EIPs) in these accounts are attached to Amazon EC2 instances or in use elastic network interfaces (ENIs) in all of the specified regions for compliance and cost-optimization purposes.
Which of the following meets the requirements with the LEAST management overhead?

Question46: An organization launched an IPv6-only web portal to support IPv6-native mobile clients. Front- end instances launch in an Amazon VPC associated with an appropriate IPv6 CIDR. The VPC IPv4 CIDR is fully utilized. A single subnet exists in each of two Availability Zones with appropriately configured IPv6 CIDR associations. Auto Scaling is properly configured, and no Elastic Load Balancing is used.
Customers say the service is unavailable during peak load times. The network engineer attempts to launch an instance manually and receives the following message: "There are not enough free addresses in subnet `subnet-12345677' to satisfy the requested number of instances." What action will resolve the availability problem?

Question47: A user has created a VPC with CIDR 20.0.0.0/16 with only a private subnet and VPN connection using the VPC wizard. The user wants to connect to the instance in a private subnet over SSH.
How should the user define the security rule for SSH?

Question48: What is the IPv6 subnet CIDR used by a VPC?
Choose the correct answer:

Question49: You would like to automate the monitoring of changes in the configurations of your AWS resources and respond programmatically to configurations of only a certain type. To do this, you could use Amazon ____ as the endpoint for the Amazon SNS topics that generate messages from AWS Config.

Question50: Your company maintains an Amazon Route 53 private hosted zone. DNS resolution is restricted to a single, pre-existing VPC. For a new application deployment, you create an additional VPC in the same AWS account.
Both this new VPC and your on-premises DNS infrastructure must resolve records in the existing private hosted zone.
Which two activities are required to enable DNS resolution both within the new VPC and from the on-premises infrastructure? (Select two.)

Question51: You deploy an Amazon EC2 instance that runs a web server into a subnet in a VPC. An Internet gateway is attached, and the main route table has a default route (0.0.0.0/0) configured with a target of the Internet gateway.
The instance has a security group configured to allow as follows:
* Protocol: TCP
* Port: 80 inbound, nothing outbound
The Network ACL for the subnet is configured to allow as follows:
* Protocol: TCP
* Port: 80 inbound, nothing outbound
When you try to browse to the web server, you receive no response.
Which additional step should you take to receive a successful response?

Question52: In Amazon CloudFront, to link to your objects, if your domain name is
d111111abcdef8.cloudfront.net and your object is image.jpg, then the URL for the link in your webpage will be _____.

Question53: A user is trying to understand the detailed CloudWatch monitoring concept. Which of the below mentioned services does not provide detailed monitoring with CloudWatch?

Question54: You run a well-architected, multi-AZ application in the eu-central-1 (Frankfurt) AWS region. The application is hosted in a VPC and is only accesses from the corporate network. To support large volumes of data transfer and administration of the application, you use a single 10-Gbps AWS Direct Connect connection with multiple private virtual interfaces. As part of a review, you decide to improve the resilience of your connection to AWS and make sure that any additional connectivity does not share the same Direct Connect routers at AWS. You need to provide the best levels of resilience to meet the application's needs.
Which two options should you consider? (Select two.)

Question55: A company uses a newly provisioned 1-Gbps AWS Direct Connect connection to configure a virtual interface for access to Amazon S3 Which configuration values is the network engineer required to provide? (Select TWO.)

Question56: Which of these modes is not a configuration mode for a WAF? Choose the correct answer:

Question57: Your hybrid networking environment consists of two application VPCs, a shared services VPC, and your corporate network. The corporate network is connected to the shared services VPC via an IPsec VPN with dynamic (BGP) routing enabled.
The applications require access to a common authentication service in the shared services VPC. You need to enable native network access from the corporate network to both application VPCs.
Which step should you take to meet the requirements?

Question58: You deploy an Amazon EC2 instance that runs a web server into a subnet in a VPC. An Internet gateway is attached, and the main route table has a default route (0.0.0.0/0) configured with a target of the Internet gateway.
The instance has a security group configured to allow as follows:
* Protocol: TCP
* Port: 80 inbound, nothing outbound
The Network ACL for the subnet is configured to allow as follows:
* Protocol: TCP
* Port: 80 inbound, nothing outbound
When you try to browse to the web server, you receive no response.
Which additional step should you take to receive a successful response?

Question59: Under increased cybersecurity concerns, a company is deploying a near real-time intrusion detection system (IDS) solution. A system must be put in place as soon as possible. The architecture consists of many AWS accounts, and all results must be delivered to a central location.
Which solution will meet this requirement, while minimizing downtime and costs?

Question60: Your company has set up AWS Direct Connect to connect on-premises to an Amazon VPC instance. Two Direct Connect connections terminate at two different Direct Connect locations. You are using two routers, R1 and R2, at your end (one of each Direct Connect connection). R1 and R2 do NOT have connectivity between them. Both routers advertise the same routers over BGP to the VGW. You have a stateful firewall on each router. The routers drop some of the traffic coming from the VPC.
Which two actions should you take to fix this problem? (Select two.)

Question61: A company has Iwo on-premises data center locations. There is a company-managed router at earn data center. Each data center has a dedicated AWS Direct Connect connection to a Direct Connect gateway through a private virtual interface The router for the first location is advertising 110 routes to the Direct Connect gateway by using BGP and the router tor the second location is advertising 60 routes to the Direct Connect gateway by using BGP The Direct Connect gateway is attached to a company VPC through a virtual private gateway A network engineer receives reports that resources In the VPC are not reachable from various locations in either data center. The network engineer checks the VPC route table and sees that the routes from the first data center. location are not being populated into the route table The network engineer must resolve this issue in the most operationally efficient manner What should the network engineer do to meet these requirements'

Question62: Which service would you use to see who changed your infrastructure? Choose the correct answer:

Question63: You run a well-architected, multi-AZ application in the eu-central-1 (Frankfurt) AWS region. The application is hosted in a VPC and is only accesses from the corporate network. To support large volumes of data transfer and administration of the application, you use a single 10-Gbps AWS Direct Connect connection with multiple private virtual interfaces. As part of a review, you decide to improve the resilience of your connection to AWS and make sure that any additional connectivity does not share the same Direct Connect routers at AWS. You need to provide the best levels of resilience to meet the application's needs.
Which two options should you consider? (Select two.)

Question64: An organization delivers high-resolution, dynamic web content. Internet users access the content from a variety of platforms, including mobile, tablet and desktop. Each platform receives a customized experience to account for the differences in viewing modes. A dedicated, automatic-scaling fleet of Amazon EC2 instances is used for each platform to server content based on path-based headers.
Which combination of services will MINIMIZE cost and MAXIMIZE performance? (Select two.)

Question65: A company recently migrated its Amazon EC2 instances to VPC private subnets to satisfy a security compliance requirement. The EC2 instances now use a NAT gateway tor internet access After the migration, some long-running database queries from private EC2 instances to a publicly accessible third-party database no longer receive responses The database query logs reveal that the queries successfully completed after 7 minutes but that the client EC2 instances never received the response.
Which configuration change should a network engineer implement to resolve this issue''

Question66: If you have one VPC peered with two VPCs with overlapping CIDRs, which route will be more preferred?
Choose the correct answer:

Question67: You have a global corporate network with 153 individual IP prefixes in your internal routing table. You establish a private virtual interface over AWS Direct Connect to a VPC that has an Internet gateway (IGW). All instances in the VPC must be able to route to the Internet via an IGW and route to the global corporate network via the VGW.
How should you configure your on-premises BGP peer to meet these requirements?

Question68: You are a network admin of a US company called Webby Widgets that is expanding to Europe.
The company has a website that serves dynamic and static content.
You have been instructed to ensure the European clients receive the least latency possible, no matter where in Europe they live, while still allowing the US clients to receive the same user experience and performance they have been accustomed to. You have also been instructed to ensure both countries use the same URL to access the site and keep costs low.
What two things should you do? Choose the 2 correct answers:

Question69: A company has recently established an AWS Direct Connect connection from its on-premises data center to AWS. A Network Engineer has blocked all traffic destined for Amazon S3 over the company's gateway to the internet from its on-premises firewall. S3 traffic should only traverse the Direct Connect connection. Currently, no one in the on-premises data center can access Amazon S3.
Which solution will resolve this connectivity issue?

Question70: You ping an Amazon Elastic Compute Cloud (EC2) instance from an on-premises server. VPC Flow Logs record the following:
2 123456789010 eni-1235b8ca 10.123.234.78 172.11.22.33 0 0 1 8 672 1432917027
1432917142 ACCEPT OK
2 123456789010 eni-1235b8ca 172.11.22.33 10.123.234.78 0 0 1 4 336 1432917027
1432917082 ACCEPT OK
2 123456789010 eni-1235b8ca 172.11.22.33 10.123.234.78 0 0 1 4 336 1432917094
1432917142 REJECT OK
Why are ICMP responses not received by the on-premises system?

Question71: What are three services that help mitigate a DDoS? Choose the 2 correct answers:

Question72: You are moving a two-tier application into an Amazon VPC. An Elastic Load Balancing (ELB) load balancer is configured in front of the application tier. The application tier is driven through RESTful interfaces. The data tier uses relational database service (RDS) MySQL. Company policy requires end-to-end encryption of all data in transit.
What ELB configuration complies with the corporate encryption policy?

Question73: Your company uses an NTP server to synchronize time across systems. The company runs multiple versions of Linux and Windows systems. You discover that the NTP server has failed, and you need to add an alternate NTP server to your instances.
Where should you apply the NTP server update to propagate information without rebooting your running instances?

Question74: Refer to the image.

You have three VPCs: A, B, and C. VPCs A and C are both peered with VPC B. The IP address ranges are as follows:
* VPC A: 10.0.0.0/16
* VPC B: 192.168.0.0/16
* VPC C: 10.0.0.0/16
Instance i-1 in VPC A has the IP address 10.0.0.10. Instance i-2 in VPC C has the IP address 10.0.0.10.
Instances i-3 and i-4 in VPC B have the IP addresses 192.168.1.10 and 192.168.1.20, respectively, i-3 and i-4 are in the subnet 192.168.1.0/24.
* i-3 must be able to communicate with i-1
* i-4 must be able to communicate with i-2
* i-3 and i-4 are able to communicate with i-1, but not with i-2.
Which two steps will fix this problem? (Select two.)

Question75: A company uses AWS Direct Connect lo connect its corporate network to multiple VPCs in the same AWS account and the same AVVS Region Each VPC uses its own private VIF and its own virtual LAN on the Direct Connect connection The company has grown and will soon surpass the limit of VPCs and private VIFs for each connection What is the MOST scalable way to add VPCs with on-premises connectivity?

Question76: You are using the CLI to assign multiple IP addresses to interfaces. The operation fails. What is the most likely reason?
Choose the correct answer:

Question77: The Payment Card Industry Data Security Standard (PCI DSS) merchants that handle credit card data must use strong cryptography. These merchants must also use security protocols to protect sensitive data during transmission over public networks.
You are migrating your PCI DSS application from on-premises SSL appliance and Apache to a VPC behind Amazon CloudFront.
How should you configure CloudFront to meet this requirement?

Question78: An application runs on a fleet of Amazon EC2 instances in a VPC. All instances can reach one another using private IP addresses. The application owner has a new requirement that the domain name received via DHCP should be different for a particular set of instances that are currently in one particular subnet.
What changes should be made to meet this requirement while continuing to support the existing application requirements?

Question79: You have just provisioned a new VPC a with a CIDR block of 172.16.12.0/24. The entire CIDR block is fully utilised by subdividing it into 6 subnets, we will refer to these as Subnet1 through to Subnet6. The first 2 subnets (Subnet1 and Subnet2) are the same size. The last 4 subnets (Subnet3, Subnet4, Subnet5, Subnet6) are also the same size. Subnet5 is half the size of Subnet2. The address space as occupied by the first two subnets is contiguous, as is the address space occupied by the last 4 subnets. Within Subnet3 AWS reserves the address 172.16.12.129 for the VPC router. Select the correct IP address reserved by AWS for DNS in the Subnet2.

Question80: You have a three-tier web application with separate subnets for Web, Applications, and Database tiers. Your CISO suspects your application will be the target of malicious activity. You are tasked with notifying the security team in the event your application is port scanned by external systems.
Which two AWS Services cloud you leverage to build an automated notification system? (Select two.)

Question81: A company has a hybrid IT architecture with two AWS Direct Connect connections to provide high availability. The services hosted on-premises are accessible using public IPs, and are also on the
172.16.0.0/16 range. The AWS resources are on the 192.168.0.0/18 range. The company wants to use Amazon Elastic Load Balancing for SSL offloading, health checks, and sticky sessions.
What should be done to meet these requirements?

Question82: Which service would you use to see CPU usage?
Choose the correct answer:

Question83: In the "start using the AWS Direct Connect steps," when can you complete the Cross Connect step?

Question84: You use a VPN to extend your corporate network into a VPC. Instances in the VPC are able to resolve resource records in an Amazon Route 53 private hosted zone. Your on-premises DNS server is configured with a forwarder to the VPC DNS server IP address. On-premises users are unable to resolve names in the private hosted zone, although instances in a peered VPC can.
What should you do to provide on-premises users with access to the private hosted zone?

Question85: Which two methods can be used to ensure items are distributed only to the correct parties?
Choose the 2 correct answers:

Question86: When an AWS Config rule is triggered a JSON object known as an AWS Config Event is created.
This object contains another JSON string in its ____ parameter, which describes the event that triggered the rule.

Question87: You have to set up an AWS Direct Connect connection to connect your on-premises to an AWS VPC. Due to budget requirements, you can only provision a single Direct Connect port. You have two border gateway routers at your on-premises data center that can peer with the Direct Connect routers for redundancy.
Which two design methodologies, in combination, will achieve this connectivity? (Select two.)

Question88: A space exploration company owns a series of telescopes that capture a large number of images and data of the night sky. The images and data are processed on an application hosted on AWS Fargate in a target group assigned to an Application Load Balancer (ALB). The application is made available through the address https
/'space example com
Scientists require another custom-built application hosted on several Amazon EC2 instances within an Auto Scaling group. This application will be made available from the address https://space.example.com/meteor.
The company needs a solution that can automatically scale from a small number of requests overnight to a large number of requests for a future meteor shower.
What is the MOST operationally efficient solution that meets these requirements?

Question89: A company installed an AWS Site-to-Site VPN and configured it to use two tunnels The company has learned that the VPN connectivity is unstable During a ping test from the on-premises data center to AWS: a network engineer notices that the first few ICMP replies time out but that subsequent requests are successful The AWS Management Console shows that the status for both tunnels last changed at the same time the ping responses were successfully received Which steps should the network engineer take to resolve the instability*? (Select TWO )

Question90: An unfortunate situation has just come to your attention. A business critical application with sensitive data running on-prem will run out of storage disk space in 24hrs. This business critical application is dependent a very large set of routes - required for integration with other system.
You make a quick but well informed decision to migrate this application quickly to AWS. You are able to quickly launch a new VPC and within it equivalent infrastructure to re-home the application. In order to complete the replication of application data and ensure the application remains operational beyond the next 24hrs, select the best implementation.

Question91: All IP addresses within a 10.0.0.0/16 VPC are fully utilized with application servers across two Availability Zones. The application servers need to send frequent UDP probes to a single central authentication server on the Internet to confirm that is running up-to-date packages. The network is designed for application servers to use a single NAT gateway for internal access. Testing reveals that a few of the servers are unable to communicate with the authentication server.

Question92: A company is about to migrate an application from its on-premises data center to AWS. As part of the planning process, the following requirements involving DNS have been identified.
On-premises systems must be able to resolve the entries in an Amazon Route 53 private hosted zone.
Amazon EC2 instances running in the organization's VPC must be able to resolve the DNS names of on-premises systems The organization's VPC uses the CIDR block 172.16.0.0/16.
Assuming that there is no DNS namespace overlap, how can these requirements be met?

Question93: An organization launched an IPv6-only web portal to support IPv6-native mobile clients. Front-end instances launch in an Amazon VPC associated with an appropriate IPv6 CIDR. The VPC IPv4 CIDR is fully utilized. A single subnet exists in each of two Availability Zones with appropriately configured IPv6 CIDR associations.
Auto Scaling is properly configured, and no Elastic Load Balancing is used.
Customers say the service is unavailable during peak load times. The network engineer attempts to launch an instance manually and receives the following message: "There are not enough free addresses in subnet
'subnet-12345677' to satisfy the requested number of instances."
What action will resolve the availability problem?

Question94: You want to send a broadcast message to your 10.0.0.0/24 subnet, which one of these addresses should you use?
Choose the correct answer:

Question95: Your organization leverages an IP Address Management (IPAM) product to manage IP address distribution.
The IPAM exposes an API. Development teams use CloudFormation to provision approved reference architectures. At deployment time, IP addresses must be allocated to the VPC. When the VPC is deleted, the IPAM must reclaim the VPC's IP allocation.
Which method allows for efficient, automated integration of the IPAM with CloudFormation?

Question96: You use a VPN to extend your corporate network into a VPC. Instances in the VPC are able to resolve resource records in an Amazon Route 53 private hosted zone. Your on-premises DNS server is configured with a forwarder to the VPC DNS server IP address. On-premises users are unable to resolve names in the private hosted zone, although instances in a peered VPC can.
What should you do to provide on-premises users with access to the private hosted zone?

Question97: Your company runs an HTTPS application using an Elastic Load Balancing (ELB) load balancer/PHP on nginx server/RDS in multiple Availability Zones. You need to apply Geographic Restriction and identify the client's IP address in your application to generate dynamic content.
How should you utilize AWS services in a scalable fashion to perform this task?

Question98: A company deployed its production Amazon VPC using CIDR block 33.16.0.0/16. The company has nearly depleted its addresses and now needs to extend the VPC network.
Which CIDR blocks meet the company's requirement to extend the VPC network with a secondary CIDR? (Choose two.)

Question99: An organization is migrating its on-premises applications to AWS by using a lift-and-shift approach, taking advantage of managed AWS services wherever possible. The company must be able to edit the application code during the migration phase. One application is a traditional three- tier application, consisting of a web presentation tier, an application tier, and a database tier. The external calling client applications need their sessions to remain sticky to both the web and application nodes that they initially connect to.
Which load balancing solution would allow the web and application tiers to scale horizontally independent from one another other?

Question100: A Network Engineer needs to create a public virtual interface on the company's AWS Direct Connect connection and only import routes which originated from the same region as the Direct Connect location What action should accomplish this?

Question101: A company wants to use thin clients running virtual desktops to replace 500 desktop computers used by its call center employees The company is evaluating Amazon Workspaces as a solution A network engineer who is testing with a thin client is unable to conned to Amazon Workspaces After entering credentials the network engineer receives the following error:
"An error occurred while launching your Workspace Please try again"
What should the network engineer do to resolve this issue?

Question102: In AWS, which tool records API calls for a specific AWS account and also delivers the log files for that account?

Question103: You run a well-architected, multi-AZ application in the eu-central-1 (Frankfurt) AWS region. The application is hosted in a VPC and is only accessed from the corporate network. To support large volumes of data transfer and administration of the application, you use a single 10-Gbps AWS Direct Connect connection with multiple private virtual interfaces. As part of a review, you decide to improve the resilience of your connection to AWS and make sure that any additional connectivity does not share the same Direct Connect routers at AWS. You need to provide the best levels of resilience to meet the application's needs.
Which two options should you consider? (Select two.)

Question104: Which of these addresses cannot be given to an EC2 instance in your VPC? Choose the correct answer:

Question105: You are configuring a virtual interface for access to your VPC on a newly provisioned 1-Gbps AWS Direct Connect connection. Which two configuration values do you need to provide? (Select two.)

Question106: A network architect is designing an internet website. It has web, application, and database tiers that will run in AWS. The website uses Amazon DynamoDB.
Which architecture will minimize public exposure of the back-end instances?

Question107: A legacy, on-premises web application cannot be load balances effectively. There are both planned and unplanned events that cause usage spikes to millions of concurrent users. The existing infrastructure cannot handle the usage spikes. The CIO has mandated that the application be moved to the cloud to avoid further disruptions, with the additional requirement that source IP addresses be unaltered to support network traffic-monitoring needs. Which of the following designs will meet these requirements?

Question108: A company is delivering web content from an Amazon EC2 instance in a public subnet with address 2001 db8 1 100 1 Users report they are unable to access the web content The VPC Flow Logs tor the subnet contain the following entries.

Which action will restore network reachability to the EC2 instance1?

Question109: Your organization uses a VPN to connect to your VPC but must upgrade to a 1-G AWS Direct Connect connection for stability and performance. Your telecommunications provider has provisioned the circuit from your data center to an AWS Direct Connect facility and needs information on how to cross-connect (e.g., which rack/port to connect).
What is the AWS-recommended procedure for providing this information?

Question110: The Web Application Development team is worried about malicious activity from 200 random IP addresses.
Which action will ensure security and scalability from this type of threat?

Question111: A department in your company has created a new account that is not part of the organization's consolidated billing family. The department has also created a VPC for its workload. Access is restricted by network access control lists to the department's on-premises private IP allocation. An AWS Direct Connect private virtual interface for this VPC advertises a default route to the company network. When the department downloads data from an Amazon Elastic Compute Cloud(EC2) instance in its new VPC, what are the associated charges?

Question112: You need to quickly view inbound traffic to an instance to determine why it isn't reaching the instance properly. What is the best tool for this? Choose the correct answer:

Question113: A company's Network Engineering team is solely responsible for deploying VPC infrastructure using AWS CloudFormation. The company wants to give its Developers the ability to launch applications using CloudFormation templates so that subnets can be created using available CIDR ranges.
What should be done to meet these requirements?

Question114: Which of the following physical layer standards is required for connection to AWS Direct Connect over a standard 1 gigabit or 10 gigabit Ethernet fiber-optic cable?

Question115: What is the maximum size of a response body that Amazon CloudFront will return to the viewer?

Question116: You use a VPN to extend your corporate network into a VPC. Instances in the VPC are able to resolve resource records in an Amazon Route 53 private hosted zone. Your on-premises DNS server is configured with a forwarder to the VPC DNS server IP address. On-premises users are unable to resolve names in the private hosted zone, although instances in a peered VPC can.
What should you do to provide on-premises users with access to the private hosted zone?

Question117: You are preparing to launch Amazon WorkSpaces and need to configure the appropriate networking resources.
What must be configured to meet this requirement?

Question118: A company is about to migrate an application from its on-premises data center to AWS. As part of the planning process, the following requirements involving DNS have been identified.
The organization's VPC uses the CIDR block 172.16.0.0/16.
Assuming that there is no DNS namespace overlap, how can these requirements be met?

Question119: Your application is hosted behind an Elastic Load Balancer (ELB) within an autoscaling group. The autoscaling group is configured with a minimum of 2, a maximum of 14, and a desired value of 2. The autoscaling cooldown and the termination policies are set to the default value.
CloudWatch reports that the site typically requires just two servers, but spikes at the start and end of the business day can require eight to ten servers. You receive intermittent reports of timeouts and partially loaded web pages.
Which configuration change should you make to address this issue?

Question120: You deploy an Amazon EC2 instance that runs a web server into a subnet in a VPC. An Internet gateway is attached, and the main route table has a default route (0.0.0.0/0) configured with a target of the Internet gateway.
The instance has a security group configured to allow as follows:
* Protocol: TCP
* Port: 80 inbound, nothing outbound
The Network ACL for the subnet is configured to allow as follows:
* Protocol: TCP
* Port: 80 inbound, nothing outbound
When you try to browse to the web server, you receive no response.
Which additional step should you take to receive a successful response?

Question121: You have a Simple AD deployment, and you wish to use it for your Microsoft Exchange email server. You are having issues finding the AD server, why might this be? Choose the correct answer:

Question122: An organization runs a consumer-facing website on AWS. The Amazon EC2-based web fleet is load balanced using the AWS Application Load Balancer, Amazon Route 53 is used to provide the public DNS services.
The following URLs need to server content to end users:
test.example.com
web.example.com
example.com
Based on this information, what combination of services must be used to meet the requirement? (Select two.)

Question123: You are moving a two-tier application into an Amazon VPC. An Elastic Load Balancing (ELB) load balancer is configured in from of the application tier. The application tier is driven through RESTful interfaces. The data tier uses relational database service (RDS) MySQL. Company policy requires end-to-end encryption of all data in transit.
What ELB configuration complies with the corporate encryption policy?

Question124: Your organization uses a VPN to connect to your VPC but must upgrade to a 1-G AWS Direct Connect connection for stability and performance. Your telecommunications provider has provisioned the circuit from your data center to an AWS Direct Connect facility and needs information on how to cross-connect (e.g., which rack/port to connect).
What is the AWS-recommended procedure for providing this information?

Question125: Your company has a 1-Gbps AWS Direct Connect connection to AWS. Your company needs to send traffic from on-premises to a VPC owned by a partner company. The connectivity must have minimal latency at the lowest price.
Which of the following connectivity options should you choose?

Question126: You have been asked to monitor traffic flows on your Amazon EC2 instance. You will be performing deep packet inspection, looking for atypical patterns.
Which tool will enable you to look at this data?

Question127: An AWS CloudFormation template is being used to create a VPC peering connection between two existing operational VPCs, each belonging to a different AWS account. All necessary components in the `Remote' (receiving) account are already in place.
The template below creates the VPC peering connection in the Originating account. It contains these components:
AWSTemplateFormation Version: 2010-09-09
Parameters:
Originating VCId:
Type: String
RemoteVPCId:
Type: String
RemoteVPCAccountId:
Type: String
Resources:
newVPCPeeringConnection:
Type: `AWS::EC2::VPCPeeringConnection'
Properties:
VpcdId: !Ref OriginatingVPCId
PeerVpcId: !Ref RemoteVPCId
PeerOwnerId: !Ref RemoteVPCAccountId
Which additional AWS CloudFormation components are necessary in the Originating account to create an operational cross-account VPC peering connection with AWS CloudFormation? (Select two.)

Question128: You ping an Amazon Elastic Compute Cloud (EC2) instance from an on-premises server. VPC Flow Logs record the following:
2 123456789010 eni-1235b8ca 10.123.234.78 172.11.22.33 0 0 1 8 672 1432917027
1432917142 ACCEPT OK
2 123456789010 eni-1235b8ca 172.11.22.33 10.123.234.78 0 0 1 4 336 1432917027
1432917082 ACCEPT OK
2 123456789010 eni-1235b8ca 172.11.22.33 10.123.234.78 0 0 1 4 336 1432917094
1432917142 REJECT OK
Why are ICMP responses not received by the on-premises system?

Question129: A Systems Administrator is designing a hybrid DNS solution with spilt-view. The apex-domain
"example.com" should be served through name servers across multiple top-level domains (TLDs). The name server for subdomain "dev.example.com" should reside on-premises. The administrator has decided to use Amazon Route 53 to achieve this scenario.
What procedurals steps must be taken to implement the solution?

Question130: Your company has decided to use AWS WorkSpaces for its hosted desktop solution. Your company has an existing AD of about 57,000 users, and you want to minimize authentication traffic from AWS to your datacenter. Your company has a lot of personnel changes, and it is crucial that these changes are reflected reliably. What two steps should you take? Choose the 2 correct answers:

Question131: A Network Engineer is troubleshooting a network connectivity issue for an instance within a public subnet that cannot connect to the internet. The first step the Engineer takes is to SSH to the instance via a local bastion within the VPC and runs an ifconfig command to inspect the IP addresses configured on the instance. The output is as follows:

The Engineer notices that the command output does not contain a public IP address. In the AWS Management Console, the public subnet has a route to the internet gateway. The instance also has a public IP address associated with it.
What should the Engineer do next to troubleshoot this situation?

Question132: An organization is migrating its on-premises applications to AWS by using a lift-and-shift approach, taking advantage of managed AWS services wherever possible. The company must be able to edit the application code during the migration phase. One application is a traditional three-tier application, consisting of a web presentation tier, an application tier, and a database tier. The external calling client applications need their sessions to remain sticky to both the web and application nodes that they initially connect to.
Which load balancing solution would allow the web and application tiers to scale horizontally independent from one another other?

Question133: An organization has three AWS accounts with each containing VPCs in Virginia, Canada and the Sydney regions. The organization wants to determine whether all available Elastic IP addresses (EIPs) in these accounts are attached to Amazon EC2 instances or in use elastic network interfaces (ENIs) in all of the specified regions for compliance and cost-optimization purposes.
Which of the following meets the requirements with the LEAST management overhead?

Question134: You are the network engineer at your company, and you are noticing issues with QoS in you're the traffic to your instances hosting a VOIP program. You need to inspect the network packets to determine if it is a programming error or a networking error. How should you do this? Choose the correct answer:

Question135: Your company has a high-availability hybrid solution that utilizes a two Direct Connect connections and a backup VPN connection. For some reason, traffic is preferring the VPN connection instead of the direct connection. You have prepended a longer AS_PATH on the VPN connection, but AWS still prefers it over the Direct Connect connections. What might you be able to do to fix this issue?
Choose the correct answer:

Question136: You operate a production VPC with both a public and a private subnet. Your organization maintains a restricted Amazon S3 bucket to support this production workload. Only Amazon EC2 instances in the private subnet should access the bucket. You implement VPC endpoints(VPC-E) for Amazon S3 and remove the NAT that previously provided a network path to Amazon S3. The default VPC-E policy is applied. Neither EC2 instances in the public or private subnets are able to access the S3 bucket.
What should you do to enable Amazon S3 access from EC2 instances in the private subnet?

Question137: A Network Engineer needs to be automatically notified when a certain TCP port is accessed on a fleet of Amazon EC2 instances running in an Amazon VPC.
Which of the following is the MOST reliable solution?

Question138: A Lambda function needs to access the private address of an Amazon ElastiCache cluster in a VPC. The Lambda function also needs to write messages to Amazon SQS. The Lambda function has been configured to run in a subnet in the VPC.
Which of the following actions meet the requirements? (Select two.)

Question139: A customer is using ABC Telecom as a network provider. The customer has 10 different offices connected to ABC Telecom's MPLS backbone. The customer is setting up an AWS Direct Connect connection to AWS and has provided the LOA-CFA to ABC Telecom. ABC Telecom has terminated the Direct Connect circuit into their MPLS backbone. To uniquely identify the customer's traffic over the MPLS backbone, the customer must encapsulate all traffic with VLAN tag 100. The customer wants to send traffic to multiple VPCs.
Which two steps should be taken to meet the customer's requirement? (Select two.)

Question140: You have a server that serves www, FTP, and mail. You need to access this server using www.yourname.com, ftp.yourname.com, and mail.yourname.com. You want to ensure an IP change results in the least number of other changes. What is the best solution? Choose the correct answer:

Question141: Your organization's corporate website must be available on www.acme.com and acme.com.
How should you configure Amazon Route 53 to meet this requirement?

Question142: You are configuring a virtual interface for access to your VPC on a newly provisioned 1-Gbps AWS Direct Connect connection. Which two configuration values do you need to provide? (Select two.)

Question143: An organization has ordered a new AWS Direct Connect connection. The AWS Management Console reports that the connection is available and BGP status is up. However, the networking team is not able to reach instances in the VPC using ping on the organization's private IP address What could cause this connectivity issue? (Choose two.)

Question144: You have just configured an Elastic Load Balancer. Assuming all settings are configured properly, about how long will it take an instance to become healthy with a 6 second HealthCheck Interval, an unhealthy threshold of 5 and a healthy threshold of 10? Choose the correct answer:

Question145: Which of the following does not configure Amazon CloudFront cache behaviors to forward cookies to an origin for web distributions?

Question146: You have a DX connection and a VPN connection as backup for your 10.0.0.0/16 network. You just received a letter indicating that the colocation provider hosting the DX connection will be undergoing maintenance soon. It is critical that you do not experience any downtime or latency during this period. What is the best course of action? Choose the correct answer:

Question147: A corporate network routing table contains 624 individual RFC 1918 and public IP prefixes. You have two AWS Direct Connect connectors. You congure a private virtual interface on both connections to a virtual private gateway. The virtual private gateway is not currently attached to a VPC. Neither BGP session will maintain the Established state on the customer router. The AWS Management Console reports the private virtual interfaces as Down.
What could you do to address the problem so that the AWS Management Console reports the private virtual interface as Available?

Question148: Your application is hosted behind an Elastic Load Balancer (ELB) within an autoscaling group. The autoscaling group is configured with a minimum of 2, a maximum of 14, and a desired value of 2. The autoscaling cooldown and the termination policies are set to the default value.
CloudWatch reports that the site typically requires just two servers, but spikes at the start and end of the business day can require eight to ten servers. You receive intermittent reports of timeouts and partially loaded web pages.
Which configuration change should you make to address this issue?

Question149: An organization is replacing a tape backup system with a storage gateway. there is currently no connectivity to AWS. Initial testing is needed.
What connection option should the organization use to get up and running at minimal cost?

Question150: A company's developers wrote an AWS Lambda function to modify existing private route tables in response to a security appliance's auto scaling events. The Lambda function will be invoked on lifecycle hooks for an Auto Scaling group and Is configured to run in a VPC The developers are unsure if the following 1AM policy provides sufficient permissions to be used as an execution role for this Lambda function.

The developers ask a network engineer to review the permissions.
Which set of permissions should the network engineer add lo the policy?

Question151: A company has an application running on Amazon EC2 instances in a VPC The application must publish custom metrics to Amazon CloudWatch in the same AWS Region The metrics include proprietary information All connectivity must be over private IP addresses.
Which solution will meet these requirements'?