EMT Practice Test

1. Question Content...

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Question1: After the BGP connection is successful and it is down again. What are the impossible reasons?

Question2: In the OSPF broadcast network, there are four routers in the same network segment, RTA, RTB, RTC, and RTD. The DR priorities are 2, 1, 1, and 0, and the Router IDs are 192.168.1.1, 192.168.2.1, 192.168. .3.1 and 192.168.4.1. If OSPF protocol is enabled on all the four routers, the BDR selected by OSPF is ________.

Question3: User wants to enable the router for packets forwarding and routing according to the policy defined by itself based on the traditional route forwarding.
To achieve this goal, policy routing can be employed.
Which of the following about the description of policy routing is wrong?

Question4: Which of the following statements about the attributes of the ISIS protocol LSP message are correct? (Multiple choice)

Question5: Regarding the BGP anti-ring mechanism, which of the following descriptions are correct? (Multiple Choice)

Question6: What is the correct description about Filter-policy?

Question7: The multicast IP address is 229.130.130.1, and what is its corresponding MAC address?

Question8: Which of the following options is correct for the assertion mechanism?

Question9: 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?

Question10: The description of configuring BGP4+, which is correct? (Multiple choice)

Question11: In an MPLS VPN network, some devices maintain VPN routing information and private network information to ensure that VPN packets can be forwarded. These devices not only need to run routing protocols but also need to run MP-BGP and MPLS protocols. What types of these devices are?

Question12: Which of the following statements is true about the database synchronization process on an IS-IS broadcast network?

Question13: Which of the following are used in Ethernet? (Multiple choice)

Question14: The path selection tool can define multiple entries, which of the following tools will automatically generate and reject any entries at the end of the configuration? (Multiple Choice)

Question15: Which of the following statements about the BFD one-armed echo function are correct? (Multiple Choice)

Question16: What improvements have been made to the IGMPV2 protocol compared to IGMPV1? (Multiple Choice)

Question17: The network administrator is ready 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: fe2c:9a6.

Question18: Which of the following statements about the IS-IS route summary is correct?

Question19: The network administrator defines the following policy for traffic policing:

If the policy is applied to a router port and there is no traffic on the port for about 10 seconds, how many bytes of burst will be available for class cl for packets to be marked as green?

Question20: The following topology and configuration are available. Which of the following statement is correct? (Multiple choice)

Question21: In an existing OSPF network, which type of LSA will cause SPF calculation? (Multiple Choice)

Question22: What benefits can be achieved after using WRED? (Multiple Choice)

Question23: Which layers are shared in the OSI reference model and the TCP/IP model? (Multiple Choice)

Question24: Which of the following description is wrong about BGP route selection?

Question25: HW users are transmitting a lot of files through TFTP. What protocol does TFTP rely on for transmission?

Question26: Which of the following about the RD attribute filter of BGP is correct? (Multiple Choice)

Question27: Which of the following statements about the BFD single-arm echo function are correct? (Multiple Choice)

Question28: Which of the following descriptions are wrong about BGP load sharing? (Multiple Choice)

Question29: In the aggregate ipv4-address { mask | mask-length }[ as-set | attribute-policy route-policy- name1 | detail-suppressed | origin-policy route-policy-name2 | suppress-policy route-policy- name3 ] command, multiple parameters can be specified to affect the route summarization process and results.
Which statements about this command are true? (Multiple Choice)

Question30: An engineer builds a network topology to study the working mechanism of OSPFv3 protocol. The configurations of R1 and R2 are as follows. What are the LSA types exchanged between R1 and R2? (Multiple Choice)

R1 configuration
ospfv3 1
router-id 1.1.1.1
interface Gigabitethernet0/0/0
ipv6 enable
ipv6 address auto link-local
ospfv3 1 area 0
R2 configuration
ipv6
ospfv3 1
router-id 2.2.2.2
interface Gigabitethernet0/0/0
ipv6 enable
ipv6 address auto link-local
ospfv3 1 area 0. 0 0.0

Question31: View the details of all VPN instances on a network device. The results are as follows. Which of the following statements are incorrect? (Multiple Choice)

Question32: Four routers R1, R2, R3, and R4 run ISIS, the ISIS router type is marked, and the routing table is viewed on R1. The reason why the R1 does not reach the route of 10.34.34.4 is ( ).

Question33: The following topology diagram, all the interfaces of the router in the figure open the ISIS protocol, which of the following statement is correct? (Multiple Choice)

Question34: 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)

Question35: Which of the following is optimal for building a loop-free Layer 2 network?

Question36: Which AS_PATH can be matched by command ip as-path-filter 1 permit ^12.*74$?

Question37: In the OSPF broadcast network, there are four routers RTA, RTB, RTC, and RTD in the same network segment. The DR priorities are 2, 1, 1, and 0 respectively. The router ID are 192.168.1.1, 192.168.2.1, and 192.168.3.1 and 192.168.4.1. If OSPF protocol is enabled on the four routers at the same time, what is the BDR selected by OSPF?

Question38: BGP EVPN advertises external routes, which of the following types of routes are used?

Question39: MPLS BGP VPN is a Layer 3 VPN technology used to provide VPN solutions (PPVPN).
What are the basic components of MPLS BGP VPN?

Question40: Regarding the processing mode of MPLS for TTL, which description is correct?

Question41: The association between LDP and IGP refers to the suppression of the issuance of reachable routes through IGP. To ensure that the LDP and IGP linkages complete network convergence. Make the IGP and LDP keep the path consistent. Minimize the loss of traffic and improve the reliability of the entire network.

Question42: Regarding Route Policy, which of the following descriptions are correct? (Multiple Choice)

Question43: 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)

Question44: WRED is configured on the newly deployed router HW. Which of the following description of the WRED feature is correct? (Multiple choice)

Question45: Which of the following belong to single package attack? (Multiple Choice)

Question46: A company has built an OSPF network as shown in the following figure. The links form an OSPF neighbor relationship. All devices have announced their own loopback address. On one day, the S1-R2 and S2-R1 links are faulty. Which of the following description is correct? (Area 0 is split)

Question47: As shown in the figure, which of the following statement is correct? (Multiple choice)

Question48: Regarding the Route Policy, which of the following description is correct? (Multiple choice)

Question49: You need to configure policy routing on the router to specify that specific traffic is forwarded through an interface.
When using policy-based routing, which two types of most typical information can be used to forward traffic along a particular path?

Question50: Which of the following statements are correct about IPsec VPN? (Multiple Choice)

Question51: The network administrator defines a traffic policing strategy as follows:
[Huawei] display traffic policy user-defined
User Defined Traffic Policy Information
Policy: p1
Classifier: c1
Operator: OR
Behavior: b1
Committed Access Rate
CIR 256(kbps) , PIR 0(kbps) , CBS 48128(byte) , PBS 80128(byte)
Color Mode: color blind
Conform Action: pass
Yellow Action: pass
Exceed Action: discard
statistic: enable
The router port to which this policy is applied has been idle for about 10 seconds. At this time, there is a huge amount of burst traffic of the c1 type, then how many bytes will the packet be colored in green?

Question52: What type of LSA does not exist in the OSPF stub area? (Multiple Choice)

Question53: Which of the following statements are correct about PPPoE data frames? (Multiple Choice)

Question54: If you run PIM-SM on a multicast network, you need to construct a multicast forwarding tree between the multicast source and the receiver for the receiver to receive multicast data, so the following descriptions are about the constructed multicast forwarding tree, which are the correct options? (Multiple Choice)

Question55: Which of the following statements about RADIUS is correct?

Question56: Which of the following statement about the R2 routing entry is correct?

Question57: Which of the following types of packets is required to implement virtual machine migration in a BGP EVPN distributed gateway scenario?

Question58: ISIS does not send CSNP packets under the P2P network type during the neighbor establishment process.

Question59: What is wrong about the description of MPLS below?

Question60: In Huawei devices, when ISIS imports external routes and sets external route tags for routing information, ISIS's metric types do not need to be modified, keep the default.

Question61: Which of the following is a single package attack? (Multiple choice)

Question62: Broadcast-type network, starting the election of DIS after the establishment of the neighbor relationship

Question63: The Level-2 LSP is transmitted to the Level-1 area by Level-1-2 IS. If the location of ATT is in the Level-2 LSP is 1, it indicates that the Level-1 in the area can pass the Level-1-2 IS to the outside area.

Question64: The ISIS protocol is deployed in an IPv6 environment. The correct statement in the following is:

Question65: The following is about the LDP protocol session establishment process, which is the correct description?

Question66: In the command aggregate ipv4-address {mask | mask-length} [ as-set | attribute-policy route-policy-name1 | detail-suppressed | origin-policy route-policy-name2 | suppress-policy route-policy-name3], multiple parameters can be used to influence the summary route and its results. What is the correct description about this command?

Question67: If a switch runs RSTP, which interface on the switch will send BPDU carrying the Proposa logo?

Question68: If OSPF is running on the network, the non-backbone area in the OSPP area is configured as the LSA with the ls-id of 0.0.0.0 in the Totally Stub Totally Stub area. What type of LSA is the LSA?

Question69: What is the role of the command peer ignore?

Question70: As shown in the following figure, enterprises hope to achieve successful access VPN between headquarters and branches through MPLS.

Branch office VPN traffic must be forwarded through the headquarters for traffic monitoring.
Which of the following statement about this solution is wrong?

Question71: Which of the following technologies use tunneling technology to communicate between IPv6 addresses?

Question72: If the PPP link between R1 and R2 is shown, and the direct connection port is not on the same network segment, but the R1 and R2 direct connection ports can communicate, and the Ethernet link cannot communicate under the same IP planning, what is the reason? (Multiple choice)

Question73: Which is wrong about IPv6 Over VXLAN?

Question74: Which of the following description about the related information of BGP4+ is correct? (Multiple choice)

Question75: About the description of the process of sending and receiving data frames in the Access mode of the switch interface, which is correct?

Question76: In the MPLS-BGP-VPN environment, if the label is only distributed through BGP or LDP, the MPLS label of the packet has at most two layers of labels.

Question77: As shown in the figure, in the hub&spoke multicast mode of MPLS bgp VPN, in order to realize that the branch can only communicate with the headquarters, the branches cannot communicate with each other. Which of the following schemes can the RT be set?

Question78: Assume that the port shaping rate is 100Mbps. The input bandwidth and PIR of each service on the interface are as follows.

Then, after the first round of scheduling, what is the bandwidth allocated by the EF queue?

Question79: As shown in the following scene, which description is true?

Question80: Enable SSM on the entire IP multicast network.
Which of the following statements about SSM are correct? (Multiple Choice)

Question81: In Huawei device, when ISIS imports external routes and sets external route tags for routing information, the ISIS metric type does not need to be modified to keep the default.

Question82: The results of the existing router data are as follows, which of the analysis conclusion is wrong?

Question83: If a Huawei switch runs the RSTP protocol, when will the BPDU on a port of the switch be aged?

Question84: Which of the following is true about Link-LSA of OSPFv3?

Question85: In an HW multicast network, the device needs to send an SSM message. What is the range of multicast addresses reserved for SSM?

Question86: Which of the following statement about the LSA of OSPFv33 is correct?

Question87: 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?

Question88: Which of the following is correct about the ISIS LSP fragmentation extension?

Question89: Which of the following description is wrong about BGP routing selection?

Question90: Regarding the inter-domain VPN Option-B solution, which of the following description is wrong?

Question91: Combined with the output of the following figure, which of the following judgment is correct? (Multiple choice)

Question92: Which of the following statement about HTTPS is wrong?

Question93: In the MPLS VPN, what is the role of RT? (Multiple choice)

Question94: As shown below, R1 and R2 establish E-BGP neighbors and enable BFD detection. The following statements which are correct?

Question95: Which of the following is the access control method provided by NAC? (Multiple Choice)

Question96: The following topology is available, and based on this analysis, which of the following statement is correct?

Question97: Which of the following tools cannot be directly referenced by the If-match clause in the Route-policy?

Question98: IPSG can configure static binding table or use DHCP-snooping to form a binding table.

Question99: The configurations of the defined route-policy test are as follows:
ip community-filter 1 permit 100:1
ip as-path-filter 2 permit ^100$
route-policy test permit node 10
if-match community-filter 1
if-match AS-path-filter 2
apply as-path 200
Which of the following statements is true?

Question100: Which of the following descriptions about the FTP protocol is correct?

Question101: Which of following statements is true about the domain-authentication-mode md5 hello command in the IS-IS process?

Question102: The following statement about the security confederation SA in IPsec, which is wrong?

Question103: The following statements about the ISS protocol route aggregation, which are correct?

Question104: The OSPFv3 Option field appears in all LSA.

Question105: Which of the following description of the ISS's GR is correct?

Question106: Which of the following statement about IPSec VPN is true? (Multiple choice)

Question107: The following statements about the VRRP protocol which are correct?

Question108: Which of the following statements about 802.1x authentication, RADIUS, and HWTACACS authentication is correct?

Question109: The network administrator defines a traffic policing strategy as follows:

The router port that uses this policy has been idle for about 10 seconds. At this time, there are huge bursts of c1 type traffic coming in an instant, so how many bytes will be colored in the green packet?

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

Question111: If the router only needs to forward IPv6 packets, then no IPv4 protocol and address need to be configured on the router.

Question112: Which scenario can use AS-path -filter?

Question113: As shown in the figure, there are two IPv6 networks that can access the IPv4 network. At the same time, an IPSEC tunnel needs to be established between the two IPv6 networks for communication. Which of the following encapsulation modes can meet the requirements above?

Question114: Two EBGP neighbors connected by two parallel cables. What method will you use to achieve bidirectional load sharing between two EBGP neighbors connected through these two parallel serial cables?

Question115: VXLAN needs to be accessed under different VPN subnets. One subnet information is as follows. EVPN RT 10:10 both, RT 1000:1000 export, VPN RT 100:100. What is the configuration of another subnet? (Multiple Choice)

Question116: Now, the switch MAC address table is empty by default configuration. The host A connected to the switch sends the first unicast data frame. What operation will the switch perform after receiving the data frame?

Question117: Which of the following description about the process of sending and receiving data frames in the Access mode of the switch interface is correct?

Question118: Which of the following statements about the BSR mechanism are true? (Multiple Choice)

Question119: The IPSG can be configured with a static binding table or used with DHCP-snooping to form a binding table.

Question120: When there are multiple matching rules in the ACL of the VRP, which of the following statements is correct about the matching order?

Question121: The following is the description of the characteristics of the cross domain vpn-Option C, which is correct? (Multiple Choice)

Question122: Which of the following is true about Link-LSA for OSPFv3?

Question123: Between the two directly connected devices that have established IBGP neighbors, run the shutdown command to shut down the interface of one of the devices. The BGP connection will not be disconnected immediately.

Question124: Which of the following statement about deploying ISIS protocol in IPv6 environment is correct?

Question125: The order for the protocols using TCP ports 443, 179, 137, 110, and 23 is:

Question126: Which of the following types of packets is required to implement virtual machine migration in the BGP EVPN distributed gateway scenario?

Question127: In RSTP, which port can provide the backup path to reach the root node of the spanning tree? What status is the port in?

Question128: 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)

Question129: During the process in which IS-IS establishes a neighbor relationship, IS-IS does not send CSNP packets on a P2P network.

Question130: Mainstream large-scale Layer 2 technologies include VXLAN, TRILL, NVGRE, and MPLS.

Question131: Which of the following information can be included in a basic network layer packet? (Multiple choice)

Question132: Non-Stopping-Forwarding (NSF) and Non-Stopping Routing (NSR) are two solutions for high reliability. The following statements which are correct? (Multiple Choice)

Question133: A home user has opened a 10Mb/s broadband. To improve the user experience, the operator can stabilize at 12Mb/s when performing speed measurement. If we use token bucket technology to achieve this demand, which of the following is the best?

Question134: Regarding the BGP confederation, which of the following description is wrong?

Question135: Regarding the Stub area and the NSSA area of the OSPF protocol, which of the following statement is wrong?

Question136: A router is configured for OSPF and is connected to two areas: area 0 and area 1. You configure area 1 as a stub area. Which LSA types will exist inside area 1?

Question137: Which of the following statements about BGP attributes are correct?

Question138: Which of the following does not belong to EVPN Type 2 routing functions?

Question139: Regarding the certification of the ISIS protocol, which statements are correct? (Multiple Choice)

Question140: In Huawei devices, when ISIS imports external routes and sets external route tags for routing information, the metric type of ISIS does not need to be modified, just keep the default.

Question141: The existing route-policy is as follows: ip community-filter 1permit 100:1 ip as-path-filter 2 permit^100$ route-policytest permit node 10 if-match community-filter 1 if-match as-path-filter 2 apply as -path 200 the above configuration description, which is correct?

Question142: Which of the following statement about the VPNv4 address is wrong?

Question143: Run the display mpls Isp command on the router to view the LSP information. The command output is as follows.

Which of the following is correct?

Question144: RD is used to distinguish the same IP address in different VPNs. How many bits does the RD contain?

Question145: The bookstore provides a wired network for customers to learn online. However, some users suddenly cannot access the network. After troubleshooting, all IP addresses in the DHCP address pool are exhausted. Which of the following is the best way to solve the problem?

Question146: If the value of the Option field in the 0SPFv3 Hello packet sent by the GigabitEthermet 0/0/0 interface on the router is 0x000013, which of the following descriptions are correct? (Multiple Choice)

Question147: Routers R1 and R2 are configured for BGP. Both routers are in AS 65234. Routes from Router R2 are in the BGP table on Router R1, but not in the IP routing table. What could be the cause of this problem?

Question148: The topology diagram 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 statement can achieve this requirement? (Multiple choice)

Question149: Regarding the basic forwarding process of MPLS, which of the following description is wrong?

Question150: There is an AS-path-filter, ip as-path-filter 1 permit ^100(_100)*(_400)*, which AS-PATH attribute cannot be matched by the As-path-filter?

Question151: The LAND attack is performed by the attacker sending a source address and a destination address to the destination host are the destination host, the same SYN packet on source port and the destination port. When the receiver waits for the final ACK packet from the sender, the connection is always in a semi-connected state, resulting in waste of limited TCP resources at the receiving end.

Question152: 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 for the traffic from the branch 1 on Router_B. Which of the following options is correct? (Multiple Choice)

Question153: As shown in the figure, R1, R2, and R3 run OSPF at the same time and announce their respective loopbacks. Which of the following description is wrong?

Question154: What is the correct description of the BGP reflector? (Multiple Choice)

Question155: Which of the following description is true about the OSPF virtual link?

Question156: About the description of CHAP authentication function in the PPP protocol, which of the following are correct? (Multiple Choice)

Question157: As shown in the figure, in the IPv4 and IPv6 environment, the SEL field in the ISIS NET address always takes the value 00.

Question158: Which of the following is true about the route penetration of ISIS? (Multiple Choice)

Question159: The Option field in OSPF3 appears in all LSAs.

Question160: In the broadcast network and the P2P network, when the router receives the LSP, it needs to use the PSNP to confirm the LSDB.

Question161: View the details of all VPN instances on a network device, the results are as follows. Which of the following statements are incorrect? (Multiple Choice)

Question162: Assume that the BGP/MPLS IPv4 VPN of Static routing and OSPF, LDP are configured on the PE to enable the NSF function. Which of the following protocols are required to configure to enable the GR function on the PE? ( Multiple Choice)

Question163: If there is a LAN running the 802.1D Spanning Tree Protocol, which of the following parameters will the non-root switch not receive from the root switch?

Question164: Which of the following description about the assertion mechanism is correct?

Question165: The following topology is available, which of the following statement is correct based on analysis?

Question166: The fields indicating priority in the VLAN (802.1Q) data encapsulation are a total of 6 bits.

Question167: When a packet is forwarded to the public network in the MPLS BGP VPN network in the domain, it will be encapsulated with two layers of MPLS labels. Which of the following description about the two-layer label is wrong?

Question168: Which AS_PATH can the command ip as-path-filter1 permit^12*74$ match?

Question169: There are two Community-filter ip Community-filter 1 permit 100: 1 200:1 ip community-filter 2 permit 100: 1 ip Community-filter 2 permit 200:1 Which is the correct description of the above Community-filter? (Multiple Choice)

Question170: 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.

Question171: When there are multiple matching rules in the ACL of the VRP, which of the following statements is correct about the matching order?

Question172: Two EBGP neighbors connected by two parallel cables. What method will you use to achieve bidirectional load sharing between two EBGP neighbors connected through these two parallel serial cables?

Question173: Four routers R1, R2, R3, and R4 run ISIS, the ISIS router type is marked, and the routing table is viewed on R1. The reason why R1 does not reach the route of 10.34.34.4 is

Question174: As shown in the figure, a part of LSP of the LSDB of a router is shown in the first line of the figure. First received a new LSP, the second hop is shown in the following picture, which of the following statement is wrong?

Question175: If there are multiple receivers in a multicast group, the administrator enables IGMP-Snooping on the switch that connects the receivers. After the receiver receives the general group query message from the querier, how do multiple recipients respond?

Question176: As shown in the following figure, the corresponding peer relationship is established. The AS400 receives the 1.1.1.1/32 network route from the AS100. What is the AS-Path attribute?

Question177: In the ISIS broadcast network database synchronization process, the following statement which is correct?

Question178: Which of the following statements are NOT true regarding the TCP sliding window? (Multiple Choice)

Question179: In the OSPF broadcast network, there are four routers in the same network segment, RTA, RTB, RTC and RTD, whose DR priorities are 2, 1, 1, and 0, and the router IDs are respectively 192.168.1.1, 192.168.2.1,192.168.3.1 and 192.168.4.1. If OSPF is enabled on all the four routers, the BDR selected by OSPF is ().

Question180: When deploying LLQ, you need to configure bandwidth parameters. What is the meaning of bandwidth parameters?

Question181: Which of the following are DoS (Denial of Service) attacks? (Multiple choice)

Question182: Which of the following is the correct description of the route priority for ISIS?