EMT Practice Test

1. Question Content...

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Question1: QinQ technology is a technology that expands the VLAN space. It achieves the function of expanding the VLAV space by adding a layer of 802.10 Tag on the basis of the 802.1Q tag message.
Which of the following statements about QINQ is wrong?

Question2: How do 802.1w and 802.1D handle BPDU?

Question3: The following topology is available, and based on this analysis, the following statements which are correct?

Question4: An OSPF protocol is running on a company network. An engineer wants to understand the OSPF mechanism to perform packet capture operations on the network, which of the following description about the OSPF packet is correct? (Multiple Choice)

Question5: Which of the following statements about URPF, IPSG and DAI are wrong? (Multiple Choice)

Question6: Which of the following protocol uses TCP ports 443, 179, 137, 110, and 23 in order?

Question7: As shown in the figure, the MP-BGP neighbor relationship is established between PE1 and PE2 through Loopback 0 interface. After the configuration is completed, it is found that CE1 and CE2 cannot learn the path from each other. Which of the following options will cause this problem? (Multiple choice)

Question8: Two routers are connected through the serial port, but the interconnect interface cannot be pinged.
Now check the port status as follows:

From the above information can determine what is the reason?

Question9: When a Layer 3 switch sends an IP packet originating from one VLAN to another LAN, which field in the following options will be written from?

Question10: As shown in the following figure, R1 and R2 establish the neighbor relationship of Level2. Which of the following statement about the R3 route entry is correct? (Multiple choice)

Question11: In a shared network, what mechanism does PIM-SM use to prevent duplicate traffic?

Question12: About the description of MPLS lable related information, which of the following is wrong?

Question13: Which of the following statement about the digital certificate is wrong?

Question14: A bookstore provides a wired network for customers to learn online. However, some users are found unable to access the network one day. After checking, the IP resource of the DHCP address pool has been exhausted. Which of the following is the best way to solve the current problem?

Question15: The topology map and configuration are as follows. Now I hope that there is no detailed routing entry of 10.6.3.3/32 in the R1 routing table. Which of the following statements can achieve this requirement?
(Multiple Choice)

Question16: If an announcement route entry is deleted on a BGP route, it will trigger the BGP router to send a Update message of route revocation, which carries the recognized mandatory attributes of the revoked route entry.

Question17: According to the configuration shown in the figure below, you can know that R4 has ____ interfaces that are advertised into IS-IS?

Question18: Which of the following description about the label space of MPLS is wrong?

Question19: Regarding the interpretation of the domain-authentication-mode md5 hello command in the ISIS process, which of the following is correct?

Question20: Which of the following statements about the VXLAN gateway are wrong?

Question21: One BD in VXLAN can correspond to multiple VNIs.

Question22: Which of the following description about the related information of BGP4+ is correct? (Multiple choice)

Question23: As shown in the configuration, if the administrator configures OSPF on R1 but R1 cannot learn the routes of other routers, what are the possible reasons? (Multiple Choice)
[R1] ospf
[Rl-ospf-1] area 2
[R1-ospf-1-area-0.0.0.2] network 10.0.13.1 0.0.0.0

Question24: Regarding the description of the extended features of ISIS, which of the following is correct? (Multiple Choice)

Question25: You want to set the DSCP value of VOIP traffic in the HW network device to EF.
According to the regional service model RFC, the traffic marking EF should be set as:

Question26: HW users are transmitting a lot of files through TFTP.
What protocol does TFTP rely on for transmission?

Question27: Deploying port isolation technology in Ethernet can realize layer 2 intercommunication and layer 3 isolation, making the network more flexible.

Question28: Router A has an IP router with a destination network segment of 10.0.0.1/32 and an outbound interface of Gigabitethernet 0/0/1.
Now add the following configuration
acl number 2000
rule 10 permit source 10. 0.1.1 0
traffic classifier test
if-match acl 2000
traffic behavior test
remark dscp cs3
traffic policy test
classifier test behavior test
interface Gigabitethernet0/0/1
ip address10.0.12.1255.255.255.0
traffic-policy test outbound
Suppose Router A receives a packet with a destination IP of 10.0.0.1. The following statements which are correct? (Multiple Choice)

Question29: Which of the following scenarios does not need to use RPF detection?

Question30: Both ISIS CSNP packets and OSPF DD packets are in the MA network, describing the role of the link state database profile. Which of the following statements is correct?

Question31: An engineer uses two routers to test IPv6 services and simulates the interconnection between headquarters and branches by running BGP4+.
as the picture shows. An engineer captures the packet to view the Update message sent by R1.

Description of the message information. Which of the following statements is correct?

Question32: What are the differences between traffic policing and traffic shaping? (Multiple Choice)

Question33: Use the IP prefix list as shown in the figure for route matching. Which of the following routes can be matched?
ip ip-prefix List1 index 10 permit 192.168.1.0 24 greater-equal 24 less-equal 27

Question34: Regarding the multicast ASM model and the SSM model, which of the following statements are correct? (Multiple choice)

Question35: Which of the following is true about the ISIS LSP fragmentation extension?

Question36: RSTP provides different protection functions in different scenarios. Which statement is wrong? (Multiple choice)

Question37: The Type 5 LSA in OSPF are used to pass external routes. Which of the following statements about the Type 5 LSA are wrong?

Question38: When running OSPFv3 on a Huawei router, the OSPFv3 process will automatically select an interface address as the Router ID of the process.

Question39: What type of BGP EVPN routes does BGP EVPN advertise MAC address, ARP information, and IRB route announcements?

Question40: The IS-IS neighbor between R3 and R1 is not established. According to the information in this figure, what is the possible cause?

Question41: Regarding the difference between NSR and NSF, which one is correct?

Question42: VRRP priority cannot be set to 0, so the device which send VRRP packets of priority 0 will stop adding VRRP backup group, and inform the backup device immediately become a Master device, without waiting for Master_Down_Interval timer expires.

Question43: Traditional BGP-4 can only manage IPv4 unicast routing information. In order to provide support for multiple network layer protocols, MP-BGP extends BGP-4.
MP-BGP uses address families to distinguish different network layer protocols. Which of the following address families are currently supported? (Multiple Choice)

Question44: Application of the two-speed double-barrel in traffic policing, the number of tokens in the C bucket is TC, a number of tokens in P bucket is TP. When a packet of length B enters, which of the following statements is correct? (Multiple choice)

Question45: Which of the following scenarios is not suitable for deploying interface policy routing?

Question46: If the temperature is found to be too high, it can be concluded that the fan has failed.

Question47: Which type of prefix will the router running BGP advertise to its own IBGP neighbor (assuming the router is not configured as a route reflector)?

Question48: The topology of a multi-protocol network is shown in the figure. Please study the topology carefully. The router (in Area1) imports the routes learned through BGP into the OSPF process. Then, what types of LSAs will R3 generate to advertise to area 0?

Question49: The network administrator defines a traffic monitoring strategy as follows: The router port to which the strategy is applied has been idle for about 10 seconds. At this time, a huge burst of traffic of type c1 arrives in an instant, then How many bytes will there be of the data packets colored in green?

Question50: Configure queue-based traffic shaping. If the queue length exceeds the cache size, the tail is discarded by default.

Question51: A number of transition techniques have emerged in the process of replacing a P4 address used in a network with a Pv6 address. These technologies are divided into two categories, one is PV4/IPv6 coexistence technology and the other is v4/P6 interworking technology. Which of the following options belong to Pv4/IP6 coexistence technology? (Multiple Choice)

Question52: As shown in the following figure, a part of the LSP of the LSDB of a router is shown in the first line of the figure. First received a new LSP, the second hop in the following picture, which of the following statement is wrong?

Question53: Which of the following description about configuring BGP4+ is correct? (Multiple choice)

Question54: As shown in the figure, all routers announce the loopback interface address in OSPF, where the R2 non-return interface address is 10.0.2.2/32, and the loopback interface address declared in Area0.R3 is 10.0.3.3/32 100.1.1.0/24 outside Routing, in order to reduce the load on the R1 router, the configuration commands are as follows:

[R1] ip pprefixt permlt 100.1.1.024
[R1]ospf1
[R1-ospf-1]Filter-policy ip-prefx 1 impot
Which of the following description is correct? (Multiple choice)

Question55: Which of the following statements are correct about PPPoE data frames? (Multiple Choice)

Question56: Which of the following descriptions of the LSA age field are correct? (Multiple choice)

Question57: The following is the description of the characteristics of the cross domain vpn-Option C, which is correct? (Multiple Choice)

Question58: Regarding the sliding window of TCP, which of the following descriptions are wrong? (Multiple Choice)

Question59: The DHCPv6 server supports to provid the host with other configuration information such as the DNS server address.

Question60: The SWA and SWB are connected by two physical Ethernet links.
The SWA has the following interface configurations:
[SWA]interface GigabitEthernet 1/0/1
[SWA-GigabitEthernet 1/0/1] port link-type trunk
[SWA-GigabitEthernet 1/0/1] port trunk allow-pass vlan 1 0 100
[SWA]interface GigabitEthernet 1/0/2
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[SWA-GigabitEthernet 1/0/2] port link-type trunk
[SWA-GigabitEthernet 1/0/2] port trunk allow-pass vlan 1 10
These two links are aggregated
Assume that the configuration on the SMB is correct.
Which of the following statements are correct in view of this information? (Multiple Choice)

Question61: The router HW does not run a routing protocol and only reaches the remote network through a default route. Use extensions on the router Ping the remote file server address 10.5.40.1. The result of ping on the router is "Request time out". root According to the above description, what is wrong in the following analysis?

Question62: In the following topology, R1 can access the Internet through R2 and R3. The EBGP connections are established between R1 and R2, R1 and R3. R2 and R3 belong to the same AS. The default route is advertised through BGP. The traffic that R1 is required to access the Internet is preferably R2. Which of the following practices can be achieved? (Multiple Choice)

Question63: Which of the following description is wrong about BGP routing selection?

Question64: The OSPF protocol is running on a company network. To understand the OSPF mechanism to perform packet capture operations on the network, which of the following description about the OSPF packet is correct? (Multiple Choice)

Question65: Which multicast protocol can generate a multicast distribution tree?

Question66: Regarding the characteristics of CE dual-homing, which of the following statement is incorrect?

Question67: The network administrator is going to use the 6to4 automatic tunnel to carry IPv6 data on the IPv4 network. The IPv4 address of the router interface is 138.14.85.210. So the corresponding tunnel address is 2001:8a0e:55d2:1:230:65ff:fe2:9a6

Question68: Which of the following features does the IS-IS protocol have? (Multiple choice)

Question69: What kind of packets can Huawei equipment perform traffic suppression for? (Multiple Choice)

Question70: Non-Stopping-Forwarding (NSF) and Non-Stopping Routing (NSR) are two solutions for high reliability. Which of the following statements are correct? (Multiple choice)

Question71: RTA is the source DR router and RTB is the RP router. The multicast source sends multicast data to RTA, but the multicast source Source registered to it through the PIM Register message cannot be seen on RTB. What are the possible reasons? (Multiple questions)

Question72: If running PIM-SM on a multicast network, you need to construct a multicast forwarding tree between the multicast source and the receiver to enable the receiver to receive multicast data. Which of the following description about the constructed multicast forwarding tree is correct? (Multiple Choice)

Question73: What are the three ways to send IPv4 packets? (Multiple choice)

Question74: Which of the following operations can implement fast fault detection on multicast network? (Multiple choice)

Question75: There are many ways to establish a cluster for modular switches. What methods do Huawei modular switches support to establish a cluster? (Multiple Choice)

Question76: An MSTP switch treats an RSTP switch as an MSTP domain consisting of a single switch. The MSTP switch resolves the RSTP BPDU to an MST BPDU, where the IRPC is 0.

Question77: What is the Router-ID of OSPFv3?

Question78: The correct description of the prefix list is: (Multiple Choice)

Question79: Man-in-the-middle attacks or IP/MAC spoofing attacks can cause information leakage and other hazards, and are more common in intranets.
In order to prevent man-in-the-middle attacks or IP/MAC spoofing attacks, what configuration methods can be adopted?

Question80: What is the value of OSPF and BFD linkage?

Question81: As shown in the figure, which of the following options can satisfy two routers to establish ISIS neighbors?

Question82: ping -a X -c Y -s Z -vpn-instance M 10.5.2, what is the meaning of this command? (Multiple choice)

Question83: The interface Serial0 of an existing router is in OSPF area 1, and the interface Serial0 is set to the Silent interface, so what effect does this setting have?

Question84: Which of the following descriptions about the FTP protocol is correct?

Question85: Which of the following descriptions are wrong about BGP load sharing? (Multiple Choice)

Question86: Which of the following description is wrong about the MAC address spoofing attack?

Question87: Huawei's two switches, SWA and SWB, are connected through seven Ethernet ports and are configured with static link aggregation. The corresponding ports on the switch SW are Ethernet 1/0/2, Ethernet 1/0/3, Ethernet 1/0/4, and Ethernet 1/0/5, Ethernet 1/0/6, and Ethernet 1/0/7. The configuration mode is configured in the order of the ports. If the switch SWA and SWB support only 6 ports in each aggregation group.

Question88: In addition to stateless address autoconfiguration, IPv6 devices can also obtain information such as addresses, gateways, and DNS through DHCPv6.

Question89: Which of the following BGP attributes are not required to be included in the Update message of BGP routing? (Multiple choice)

Question90: Which AS_PATH can the command ip as-path-filter1 permit^12*74$ match?

Question91: ICMPv6 has two types: Error Messages and Information Messages.

Question92: Regarding route import, which of the following descriptions is correct? (Multiple Choice)

Question93: Which type of LSA cannot in the OSPF stub area? (Multiple Choice)

Question94: Two routers connected through a firewall cannot establish a BGP neighbor relationship. What is the cause?

Question95: Which of the following descriptions are correct about IGMPv1 and IGMPv2? (Multiple choice)

Question96: When there are multiple matching rules in the ACL of the VRP, which of the following statements is correct about the matching order?

Question97: Which of the following role of Link-LSA in OSPFv3 not include?

Question98: Which of the following is the correct description of the process of registering the source DR with the RP in the PIM-SM?

Question99: Which of the following statements about static VXLAN channel configuration are correct? (Multiple choice)

Question100: Regarding BGP recognized arbitrary attributes, which of the following descriptions are correct? (Multiple choice)

Question101: Traditional BGP-4 can only manage IPv4 unicast routing information. In order to provide support for multiple network layer protocols, MP-BGP extends BGP-4. Among them, MP-BGP's support for IPv6 unicast networks is called BGP4+, and BGP4+ carries routing next-hop address information through the NextHop attribute.

Question102: The HW equipment network administrator plans to migrate IGMPv2 to IGMPv3 in the multicast netbook. Compared with IGMPv2, what are the improvements of IGMPv3? (Multiple choice)

Question103: An existing switch runs the RSTP protocol. If the network topology changes, what will happen to the Layer 2 forwarding entries automatically learned by the switch?

Question104: In order to reduce the number of OSPF routes in some stub areas, OSPF has developed a special area function. Which of the following description is true about the OSPF special area feature?

Question105: Which of the following statement about the static LSP configuration in the MPLS network is wrong?

Question106: The routing tools that are not only used for the BGP routing protocol are _______. (Multiple choice)

Question107: The four routers are running IS-IS and have established adjacency relationships. The area numbers and router levels are marked as shown in the figure. If route penetration is configured on the R1 device, what is the cost of R4 to 10.0.2.2/32?

Question108: Regarding the OSPFv3 protocol, which of the following description is wrong?

Question109: Regarding routing control, which of the following description is correct? (Multiple choice)

Question110: In addition to stateless address autoconfiguration, IPv6 devices can also obtain information such as address, gateway and DNS through DHCPv6.

Question111: When judging LSA is old or new, will use the serial number of the reference models and age parameters, which the following statements about the two parameters are correct? (Multiple choice)

Question112: IPSG can configure static binding table or use DHCP-snooping to form a binding table.

Question113: Deploying the ISIS protocol in an IPv6 environment, which of the following statement is correct?

Question114: A Router LSA is shown in the figure. Which of the following statement is wrong?

Question115: Although the STP protocol can solve the loop problem, the slow convergence of the network topology affects the user's communication quality. RSTP has made many improvements to STP. Which of the following is not an improvement of RSTP to STP?

Question116: In order to allow the routers at both ends of the IPv6 over IPv4 manual tunnel to exchange routing information, OSPFv3 can be enabled on the tunnel. OSPFv3 will be able to form a neighbor relationship normally, and the tunnel interface will be treated as a P2P link interface.

Question117: Which of the following statements about the BFD single-arm echo function are correct? (Multiple Choice)

Question118: For Layer 2 VPN technology, which of the following statements are correct? (Multiple Choice)

Question119: ISIS and OSPF are running on a network at the same time. The topology is shown in the figure. The two border routers: RTB and RTC, are respectively configured to import routes, and the devices are connected by one gigabit port, 2.2.2.2/32 network segment is imported into OSPF by import-route-direct on RTD. Assuming that all other configurations are dead and the default configuration, which about the description of this network is wrong?

Question120: Which of the following description of the MUX VLAN in the Huawei switch is correct?

Question121: What are the wrong statements about OSPF Router LSA and Network LSA? (Multiple questions)

Question122: When configured ISIS the area authentication, which ISIS packets will carry the Bands authentication information?

Question123: When the payload is an ICMPv6 packet, if the extended header is not considered, what is the value of the Next Header field in the IPv6 header?

Question124: As shown in the figure, the ISIS overload bit is set in the configuration of router R3. Which of the following statements is correct? (Multiple Choice)

Question125: Regarding the inter-domain VPN Option-B solution, which of the following description is wrong?

Question126: As shown in the figure below, R1, R2, and R3 have enabled IPv6 in the ISIS process and established a Leve12 neighbor relationship. Which of the following statements are correct about the IP routing table of R3? (Multiple choice)

Question127: Which of the following are the advantages of using stacking and clustering technology to build a campus network? (Multiple choice)

Question128: A home user has opened a 10Mb/s broadband. To improve the user experience, the operator can stabilize at 12Mb/s when measuring speed. If we use token bucket technology to achieve this demand, which of the following methods is optimal?

Question129: By default, the switch configures the MAC address table to be empty. Host A connected to the switch sends the first unicast data frame. What operation will the switch perform after receiving the data frame?

Question130: If there are multiple receivers in a multicast group, the administrator enables IGMP-Snooping on the switch connecting the receiver. After the receiver receives the general query message from the querier, the receiver receives multiple receivers. How to respond?

Question131: Which of the following description about interfaces on the switch Access procedure receives data frame mode is correct?

Question132: Regarding the stub area and NSSA area of the OSPF protocol, which of the following statements are wrong?

Question133: As shown in the figure, the IPSEC VPN is established between the branch and the headquarters using redundant links. At the same time, URPF is enabled on the traffic from the branch 1 on Router B.
Which of the following options is correct? (Multiple Choice)

Question134: Which of the following description is true about BGP aggregation?

Question135: As-path-filter:ip as-path-filter 1 permit*(1001400 ) $ is existing, which AS_PATH attributes may be matched by the As-path-filter?

Question136: BGP4+ uses the Next_Hop attribute in the Update message to carry the next hop address of the IPv6 route.

Question137: Which of the following statements about MUX VLAN are correct? (Multiple choice)

Question138: Which of the following statement about the Router-LSA of OSPFv3 is correct? (Multiple choice)

Question139: Which of the following statements about the attributes of the ISIS protocol LSP message are correct?
(Multiple choice)

Question140: Which of the following advanced features does BGP EVPN support?

Question141: The HTTP protocol is based on TCP. Therefore, you can use the TCP Flood attack defense method to defend against HTTP flood attacks.

Question142: A routing tool can define multiple entries.
Which tool will automatically add a deny-any entry at the end of the configuration? (Multiple Choice)

Question143: When DLDP detects a unidirectional link on an interface, the default operations on Huawei devices include: DLDP switches to the interface to Disable state, generates a trap and sets the interface state to DLDP Down.

Question144: The configuration of two routers in a company is as follows. which of the following statement about the R1 routing table is correct?

Question145: The correct description in the following of BGP loop protection is: (Multiple Choice)

Question146: As shown in the figure, the A department of branch 1 can access the Internet, but the B department can only use the encrypted VPN to access the headquarters resources. You can configure the NAT policy on the export device so that department A can access the Internet and configure IPsec VPN (ESP protocol) for department B + tunnel mode method to allow it to access the headquarters.

Question147: Which version of the VRRP protocol is correct? (Multiple questions)

Question148: In an MPLS domain, LSRs can be divided into Ingress LSR, Transit LSR, and Egress LSR according to the way of LSR processing data. For the same FEC. A certain LSR may also be the Ingress LSR of the FEC or the transit LSR of the FEC.

Question149: As shown in the following picture, which of the following description is correct?

Question150: The following is about the LDP protocol session establishment process, which is the correct description? (Multiple choice)

Question151: A newly deployed HW router is configured for Weighted Random Early Discard (WRED) on the HW network.
WRED has which of the following characteristics? (Multiple Choice)

Question152: As shown in the following topology diagram, all the interfaces of the router in the figure are all enabled with the ISIS protocol. The correct statements of the following are: (Multiple Choice)

Question153: After the BGP route is imported to other protocols, the next hop in the BGP routing table is the same as the next hop of the routing protocol imported.

Question154: The following are the statements about LDP reliability, which one is wrong?

Question155: SSH uses asymmetric encryption algorithms AES and DES to realize the security of data transmission, and uses HMAC to ensure the integrity of the data.

Question156: If the default route is not used in the local IP routing table, the default route-import command is used to advertise the default route to the BGP peer (group).

Question157: Huawei's SDN controllers using VXLAN technology is ____.

Question158: What is the main reason why RSTP converges faster than STP?

Question159: What improvements have been made to the IGMPv2 protocol compared to IGMPv1? (Multiple Choice)