EMT Practice Test

1. Question Content...

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Question1: Regarding the role of ping and tracert, which of the following statements is correct?

Question2: In an intra-domain MPLS VPN network, when a data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description is wrong about the two layers of labels? (Multiple choice)

Question3: As shown in the figure, a certain park has deployed IPv6 for service testing, and there are 4 routers in the network. Run OSPFv3 to realize network interconnection.

Regarding the LSA generated by the OSPFv3 network, which of the following statements is wrong?

Question4: Which of the following is not part of the preliminary preparations for the cutover plan?

Question5: According to this picture, what can we judge? (Multiple choice)

Question6: In OSPF, ABR will convert all Type 7 LSAs in the NSSA area into Type 5 LSAs.

Question7: When troubleshooting the EBGP neighbor relationship, you found that two directly connected devices use Loopback ports to establish a connection, so execute display current-configuration configuration bgp to view the configuration of peer ebgp-max-hop hop-count. Which of the following statements is correct?

Question8: By executing the () command, users on different ports of the same VLAN can be completely isolated at Layer 2 and Layer 3 and cannot communicate. (Please use English lowercase letters to complete the command, and the command cannot be abbreviated)

Question9: In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Regarding the description of the two layers of labels, which of the following options is wrong?

Question10: Regarding the description of the MPLS forwarding mechanism, which of the following is correct? (Multiple choice)

Question11: As shown in the figure, the entire network of a certain company uses OSPF to get through the network. However, RouterS and RouterE cannot establish an OSPF neighbor relationship. When detecting OSPF failures, network administrators can execute the display ospf 100 () interface GEO/0/1 command on RouterS to obtain error-related information. Users can perform OSPF failure diagnosis based on this information. (Please use English lowercase letters to complete the command, and the command cannot be abbreviated)

Question12: Display interface GE0/0/0 once, and find that the Total Eror count (the total number of error packets on the physical layer of the interface) is not 0. At this point, it can be concluded that the current fault has not disappeared.

Question13: ping -a X-c Y-s z -vpn-instance M 10.5.16.2, what is the meaning of this command? (Multiple choice)

Question14: In order to publish IPv6 routes in BGP4+, what fields are added in Update?

Question15: EGP authentication can prevent illegal routers from establishing neighbors with BCP routers. BCP authentication can be divided into MD5 authentication and Keychain authentication. Which of the following BGP messages will carry BCGP Keychain authentication information? ((Multiple choice)

Question16: As shown in the figure, all interfaces of the router enable OSPF. The ip address identified in the figure is the IP address of the device's Loopback 0 port. R1, R2, R3EJLoopbacD are advertised in area 1, and Loopbacfk D of R4 is advertised in area D, the Loopback D of R5 is advertised in area 2. Which of the following addresses can ping each other?

Question17: As shown in the figure, network administrator A on the R1 router, after modifying the Local Preference value of the routing entry sent to R2 through the routing policy, can control the path of traffic leaving AS100.

Question18: Regarding sham link, which of the following description is wrong?

Question19: According to this picture, we can judge:

Question20: In order to prevent hackers from attacking user equipment or network through MAC address, the MAC address of untrusted users can be configured as black hole MAC address to filter out illegal MAC

Question21: As shown in the figure, which of the following statement is correct? (Multiple choice)

Question22: Configure under a certain interface: isis timer hello 5 leve1-2, which of the following statements is correct?

Question23: The IS-IS neighbor between R3 and R1 is not established. According to the information in this figure, what is the possible cause?

Question24: The rollback operation of the project cutover can be determined temporarily according to the situation during the cutover, and no advance planning is required.

Question25: Configure ipv6 preference in IS-IS protocol view. The function of this command is to configure the preference of IPv6 routes generated by lS-Is protocol.

Question26: Regarding BGP/MPLS IPVPN routing interaction, which of the following descriptions is wrong?

Question27: Which of the following statement is wrong?

Question28: As shown in the figure, MPLS/BGP IPVPN is deployed in the network. The MP-BGP neighbor relationship is established between PE1 and PE2 through the LoopbackD interface. After the configuration is completed, it is found that CE1 and CE2 cannot learn routes from each other. Use the command on PE2 to query neighbor information as shown in the figure. What is the most likely cause of the problem?

Question29: Which of the following regarding the configuration description is wrong?

Question30: What are the work that needs to be performed in the closing phase after the cutover acceptance is completed? (Multiple choice)

Question31: When OSPFv2 evolves to OSPFv3, the format and function of LSA are exactly the same, except that the network layer address in LSA changes from IPv4 to IPv6.

Question32: Regarding the cause of the dual-master failure of the VRRP backup group, which of the following is the most unlikely?

Question33: Basic QinQ can select the outer tag encapsulation method according to the type of business.

Question34: Senior engineers with rich experience can quickly solve faults only by relying on experience, and the efficiency is very high.

Question35: In the DU label distribution mode, if the Liberal retention mode is adopted, the device will retain all the labels distributed by the LDP Peer, regardless of whether the LDP Peer is the optimal next-hop to reach the target network segment.

Question36: The routing attributes of the three routing entries are shown in the figure. Assuming that the next hop of the three routing entries are all reachable, when the three routing entries arrive at the BP router in sequence, by default, BGP will finally select one route entry?

Question37: As shown in the figure, the cost value of the link that all interfaces of the router enable DSPF is identified in the figure.

The Loopback D interface of R2 is advertised in area 1. Then the cost value of R1 to 10.2/32 is:

Question38: In an MPLS network, SR running the DP protocol exchange LDP messages to realize functions such as neighbor discovery, session establishment and maintenance, and label management. In order to ensure the reliability of message delivery, all sending and receiving of LDP messages must be based on TCP connections.

Question39: According to this picture, what can we judge? (Multiple choice)

Question40: As shown in the figure, OSPF is deployed in a campus, and Area 1 is deployed as an NSSA area. By default, R2 will automatically generate a Type 7 LSA default route and flood it in the NSSA area.

Question41: During the process of viewing the debug output through the SSH terminal, a lot of information pops up. Which of the following operations can make the Moni tor terminal no longer pop up the debug message? (Multiple choice)

Question42: Which of the following role of Link-LSA in OSPFv3 not include?

Question43: To ensure security, authentication can be configured in the OSPFv3 process area view.

Question44: (Connection question) Please correspond the alarm level with the importance of the fault and the countermeasures. (Multiple choice)

Question45: Compared with the OSPFv2 message header, what fields are added in the OSPFv3 message header?

Question46: Regarding the label space of MPLS, which of the description is wrong?

Question47: Network administrator A wants to use ACL to match specific routing entries. Which of the following routing entries will be matched by the ACL rules in the figure? (Multiple choice) acl number 2000 rule 10 permit source 10.0.0.0 0.0.6.0

Question48: According to the configuration shown in the figure below, you can know that how many interfaces of R4 are advertised into IS-IS?

Question49: The output information of a router is as follows. Which of the following reasons cause the OSPF adjacency relationship to fail to be established normally? (Multiple choice)

Question50: Regarding BGP/MPLS IPVPN data forwarding, which of the following description is wrong?

Question51: In a multi-level RR scenario, a large number of second-level RR are connected to the first-level RR, which may cause the BGP routing table of the first-level RR to overflow. What method can be used to reduce the risk of overflow of the BGP routing table of the first-level RR?

Question52: OSPF is deployed in a campus to realize network interoperability. The L SDB of R2 is shown in the figure. What information can be derived from this LSDB? (Multiple choice)

Question53: When deploying MPLS/BGP IP VPN, regarding the use of BGP to exchange routing information between PE-CE, which of the following description is wrong?

Question54: R1 executes the operation ping -a 10.1.1.1 10.5.16.2, what does this command mean?

Question55: Please sort by the cutover execution steps.

Question56: By default, LDP adjacencies will trigger the establishment of LSP based on the IP routing of the 32bit address.

Question57: In the finishing work of the structured network troubleshooting process, which of the following are the documents that need to be handed over? (Multiple choice)

Question58: Which packets can Huawei devices perform traffic suppression for? (Multiple choice)

Question59: Which of the following statements about the MP_REACH_NLRI attribute of BGP4+ is correct? (Multiple choice)

Question60: As shown in the figure, all interfaces of the router enable OSPF, and the configurations of R1, R2, and R3 are as shown in the figure, then () will generate a Type 3 LSA with a linkState ID other than 0.0.0.0. (Please fill in the device name, such as R1)

Question61: In an MPLS VPN network, data packets are forwarded when they enter the public network. Will be encapsulated with two layers of MPLS labels.
Which of the following descriptions are correct about the processing of the data packet? (Multiple choice)

Question62: LDP messages are exchanged between LSRs running the LDP protocol. LDP messages can be divided into four types according to their functions. Which of the following is not an LDP message type?

Question63: When troubleshooting dual-master faults in a VRRP backup group, which of the following statements is wrong?

Question64: According to this picture, what can we know? (Multiple choice)

Question65: As shown in the figure, Client1 and Client2 act as clients of RR1 and RR2 at the same time, RR1 and RR2 are in the same Cluster, and R has introduced 10 routes. Assume that the BCP configuration is correct.

The neighbor relationship has been established. How many routing entries are there in the BGP routing table of Client2 ultimately?

Question66: What is the flooding scope in OSPFv3 for the LSA in the entire autonomous system?

Question67: When deploying BCPIMPLS TP VPN, the OSPF VPN route tag (VPN Route Tag) is not transmitted in the MP-BGP extended community attributes. It only makes sense on PE routers that receive MP-BGP routes and generate OSPF LSA.

Question68: In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description of the two layers of labels is wrong?

Question69: As shown in the figure, PE1 and PE2 and their respective CEs exchange private network routing information through OSPF, and the same DomainID is configured on PE1 and PE2. When routes are imported from BGP to OSPF on PE2, which of the following types of SA may be delivered to CE2? (Multiple choice)

Question70: Regarding the BGPI MPLS IPVPN network architecture, which of the following descriptions is wrong?

Question71: Which of the following will not cause the VRRP backup group to oscillate?

Question72: OSPFv2 is an IGP running on an IPv4 network, OSPFvV3 is an ICP running on an IPv6 network. OSPFv3 and OSPFv2 have the same message types, including Hallo messages, DD messages, LSU messages, LSU messages and SACK messages.
Regarding OSPFv3 packets, which of the following statements is correct?

Question73: There is the concept of forwarding equivalence class FEC in MPLS, which of the following description is wrong? (Multiple choice)

Question74: The ipv6 enable topology standard is configured in IS-IS protocol view. The meaning of this command is that Pv4 and IPv6 share the same topology.

Question75: The routing policy tools that BGP can use mainly include Filterpolicy and Route-policy. Its Fiterpolicy can only filter routes, and Rote-policy can only modify routes.

Question76: Network administrator A wants to check the neighbor status of BGP router R2. R2's BGP neighbor status information is shown in the figure. Please help network administrator A to obtain the following information: The AS where R2 is located is AS (). (Note: Only write numbers, do not add punctuation or spaces)

Question77: The Router ID of OSPFv3 needs to be configured in dotted decimal notation with a length of 128bits.

Question78: As shown in the figure, all routers run OSPF, because R3 is in the backbone area, so there is no type 3 LSA in the LSDB of R3.

Question79: What types of Link Types are included in the Router LSA in OSPF? (Multiple choice)

Question80: (Drag and drop) Please match the following DHCP attack types with corresponding explanations.

Question81: If you want to check files under Flash, which command should use?

Question82: According to this picture, what can we judge? (Multiple choice)

Question83: The network administrator A wants to use ACL to match only the four routing entries 1, 3.5, and 7 in the figure. How many ACL rules does the network administrator A need to configure at least?

Question84: Which of the following regular expressions can only match BGP routing entries that pass through AS200 and then AS300?

Question85: The link state value information between different ISIS processes of multiple routers is considered to be isolated.

Question86: BGP routing strategy can control the distribution and reception of routes.

Question87: By default, the Domain ID of each OSPF process running on the router is the same as the process number of the process, which can be modified by the domain-id command under the process

Question88: MPLS has always been slower than IP forwarding.

Question89: Regarding the MPLS forwarding process, which description of the ingress node forwarding is correct? (Multiple choice)

Question90: An engineer uses two routers to test IPv6 services, and simulates the interconnection between the headquarters and branches by running BGP4+. As shown in the figure, an engineer captures the packet to view the update message sent by R1.


Regarding the description of the message information, which of the following statements is correct?