1. (Single choice) 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 packets to check the update message sent by R1. Which of the following statements is correct about the description of the message?
A. The next hop address of the route described in this message is: 2001:db8::2345:1::1
B. This message describes the currently withdrawn IPv6 route
C. The routing address prefix and its prefix length described in the message are: 2001:db8:2345:1::1/128/
D. The route described in the message may be imported through import
Question answer: C
Analysis: Because we can know from the message that the next hop address of the route described in the message is: 2001:db8::2345:12::1, mp_reach_NLRI indicates that the message describes the reachability information of ipv6 The message is not a revocation message. The prefix information described is: 2001:db8:2345:1::1/128, where orgin:igp in the path attribute indicates that the route is injected into the bgp routing table through the network, so select Option C.
2. (Single choice) As shown in the figure, a campus has deployed IPv6 for service testing, and there are 4 routers in the network. Run OSPFv3 to implement network interconnection. Regarding the LSAs generated by this OSPFv3 network, which of the following statements is false?
A. R1 will generate Router-LSA to describe the device interface information, and will receive Router-LSA generated by R2 and R3
B. There is a Network LSA generated by R3 in the LSDB of R1, indicating that R3 may be the DR of this link
C. R1 will receive two Link-LSAs generated by R2, describing the two link information connected by R2 respectively
D. As ABR, R2 will generate Inter-Area-Prefix-LSA to describe the IPv6 address prefix of Area 1, and notify R1 and R3
Question answer: C
Analysis: Each device will generate its own type of lsa, and AR1, AR2, and AR3 belong to area0, so they will receive their own type 1 lsa. Type 2 lsa can only be generated by DR, and R3 may be the DR of this link at will. The link-lsa is only flooded on this link, so a link-lsa about the G0/0/1 interface generated by R2 can be received by R1, and the answer of C is wrong. As an ABR, R2 can try the ipv6 prefix of area1 described by type 3 lsa and notify R1 and R3.
3. (Single choice) Click to configure IS-IS lPv6 enable. What is the meaning of this command?
A. Activate IPv6 IS-IS process 1 on the interface B. Activate IPv6 IS-IS process 3 on the interface
C. Activate IPv6 IS-IS process 10 on the interface D. Activate IPv6 IS-IS process 2 on the interface
Answer to the question: A
Analysis: Because the command IS-IS lPv6 enable means to activate IPv6 IS-IS process 1 on the interface, so choose option A.
4. (Drag and drop) The configuration shown in the figure is executed on R2 to filter all received routes. Assume that there is a BGP route with the AS_Path attribute of [100 200 300 400] on R1 that needs to be sent to R2, please help the network administrator adjust the order of AS in the AS_Path attribute of the route on R1 to ensure that the routing entry will not be filtered by the routing policy of R2 ,
A、300—A 400—C 100—B 200—D B、400—A 200—B 300—C 100—D
C、300—B 400—A 100—C 200—D D、300—C 400—A 100—B 200—D
Answer to the question: B
Analysis: _^[^4]00 300 100$ _ indicates a space, ^[^4]00 indicates an as-path attribute that does not start with 400, that is, the second as-path is not 400, the third and fourth as -path is 300 100. The as-path sequence is: 400 200 300 100.
Therefore the answer is B.
5. (Single choice) The ORF function of BGP can control the routing entries sent by neighbors. In order to achieve this purpose, the BGP router will send the list of routes to be filtered to the neighbors. Which tool is generally used to send the list to the neighbors?
A、ACL B、Filter-Policy C、IP Prefix List D、Route-Policy
Question answer: C
Analysis: Because the IP Prefix List tool is generally used to send the list to the neighbor, the BGP router will send the route list to be filtered to the neighbor, so that the ORF function of BGP can control the routing entries sent by the neighbor, so choose option C. Here only part of the question bank is provided for you. If you are taking the HCIP exam, you can search for the VX applet [Zhuoying Education joinlabs] and you can easily brush the questions on your mobile phone [package update is free]
6. (Single choice) A network engineer outputs the following information when troubleshooting OSPF faults. Based on this, what causes the adjacency relationship to fail to be established normally?
A. Authentication passwords are inconsistent B. Area types are inconsistent
C. The sending interval of Hello packets is inconsistent. D. The IP address mask of the interface is inconsistent.
Question answer: D
Analysis: According to the output information when OSPF fails in the picture, netmask mismatch: 2 means that the reason why the adjacency cannot be established normally is that the IP address masks of the interfaces are inconsistent, so choose option D.
7. (Single-choice question) A certain router runs OSPF, and the output information is as shown in the figure. Which of the following statements is correct?
A. The type of the LSA is AS-externa1-LSA B. The destination network described by the LSA is 10.0.23.0/24
C. The LSA in the figure is generated by this router D. This device is an ABR
Answer to the question: B
Analysis: type: sum-net indicates that this lsa is a type 3 lsa, adv rtr: 10.0.12.2 indicates that the advertised router is 10.0.12.2, and the router id of this device can be known as 10.0.12.1 in the title, so this device is not ABR, this lsa is not generated by this device. The Ls id is 10.0.23.0, indicating that the target network segment described by this lsa is 10.0.23.0/24. So choose option B.
8. (Single choice) When there are multiple redundant links in the IS-IS network, multiple equal-cost routes may appear. Regarding equal-cost routing in IS-IS networks, which of the following statements is incorrect?
A. When the number of equal-cost routes in the network is greater than the number configured by the command, and these routes have the same priority, the route with the larger system ID of the next-hop device is preferred for load sharing.
B. If load sharing is configured, traffic will be evenly distributed to each link
C. After the equal-cost route priority is configured, when the IS-IS device forwards the traffic to the destination network segment, it will not use the load sharing method, but will forward the traffic to the next hop with the highest priority
D. For each route in the equal-cost route, you can specify a priority, and the route with the highest priority will be preferred. The rest act as backup routes
Answer to the question: A
Analysis: After the equal-cost route priority is configured, when the IS-IS device forwards the traffic to the destination network segment, it will use the load sharing method to forward the traffic to the next hop with the highest priority. If the priority is the same, select The one with the smaller system id is used as the next hop. So choose option A.
9 (single choice) As shown in the figure, all routers run 0SPF. Which of the following statements is correct?
A. R2 generates Router LSAs in both area 1 and area 0. B. R2 forwards the Router LSA generated by R3 to R1.
C. R2 forwards the Router LSA generated by R1 to R3 D. R2 only generates Router LSA in area 0
Answer to the question: A
Analysis: According to the picture, we can know that R2 will generate Router LSA in both area 1 and area 0, so choose option A.
10. (Single-choice question) What is the value of the linkage between OSPF and BFD?
A. The hello sending interval of OSPF is second level, which is faster than BFD sensing link status.
B. The BFD packet sending interval can reach the millisecond level, which is slower than OSPF sensing link status
C. Through the BFD detected at the millisecond level, it is associated with the 0SPF state to achieve the purpose of OSPF quickly sensing the state of the tank circuit
D. Any change in the BFD state will not affect the 0SFF neighbor state
Question answer: C
Analysis: Because the value of the linkage between OSPF and BFD is that the BFD detected at the millisecond level is associated with the 0SPF status to achieve the purpose of OSPF quickly sensing the link status. So choose option C.
11. (Single-choice question) According to this picture, which one is correct about the IPv6 routing information calculated by the R4 router through IS-IS?
A. R4 has 1 IS-IS default route B. R4 has 2 equivalent IS-IS default routes
C. R4 has 2 unequal IS-IS default routes D. R4 has no IS-IS routing entries
Answer to the question: B
Analysis: From the information in the figure, Nexhop is equal to FE80::2E0:FCFF:FE98:2576, FE80::2E0:FCEE:FEA7:5813, and two default routes can be obtained. From the Public Routing Table: IS-IS, both are It is generated by isis, and Cost is equal to 10, so only option B is correct among the four options. Here only part of the question bank is provided for you. If you are taking the HCIP exam, you can search for the VX applet [Zhuoying Education joinlabs] and you can easily brush the questions on your mobile phone [package update is free]
12. (Single-choice question) The routing attributes of the three routing entries are shown in the figure. Assuming that the next hops of the three routing entries are all reachable, when the three routing entries arrive at the BP router in sequence, by default, BGP will eventually Preferably call a routing entry?
A、Route B B、Route C C、Route A D、略
Question answer: C
Analysis: According to the route selection principle of BGP, first compare the as-path attribute. The lengths of the three routes are the same, so they cannot be compared. Then compare the MED value. The MED value of route A is the smallest, so the route of route A will be preferred. Therefore the answer is C
13. (Single-choice question) As shown in the figure, Client1 and Client2 serve as clients of RR1 and RR2 at the same time, RR1 and RR2 are in the same CIuster, and R1 introduces 10 routes. Assuming BGP is configured correctly. All the neighbor relationships have been established. How many routing entries exist in the BGP routing table of Client2?
A、10 B、20 C、0 D、15
Answer to the question: B
Analysis: As shown in the figure, RR1, RR2, client 1, and client2 belong to the same reflection cluster. When client1 receives the route sent by R1, it will be transmitted by RR1 and RR2. Of course, RR1 and RR2 will also be reflected to client2, and client2 will receive it. 20 routes. Therefore the answer is B.
14. (Single-choice question) Which of the following is not a hardware preparation item for cutover?
A. Test board operation B. Power-on test C. Device version check D. Cable connectivity test
Question answer: C
Analysis: Because device version checking is a software preparation item, choose option C.
15. (Single-choice question) Which of the following statements is incorrect when troubleshooting the dual-master failure of the VRRP backup group?
A. There is no need to check whether the switch port that transmits the VRRP advertisement message is in the same VLAN
B. Need to check whether the VRRP group IDs on the interfaces are the same
C. Need to check whether the interface IP address is in the same network segment
D. It is necessary to check whether the virtual IP addresses of the VRRP group are the same
Answer to the question: A
Analysis: If the switch port of the VRRP notification message does not belong to a vlan, then the vrrp message sent between the devices cannot be received by the devices in the same vrrp group, then the device will think that it is the master device, resulting in dual master Phenomenon. So choose option A.
16. (Single-choice question) When troubleshooting the EBGP neighbor relationship, you find that two directly connected devices use the Loopback port to establish a connection, so execute display current-configuration configuration bgp to check the configuration of peer ebgp-max-hop hop-count, as follows Which statement is correct?
A. The hop-count must be greater than 2 B. The hop-count must be greater than 15
C. hop-count must be greater than 1 D. hop-count must be greater than 255
Question answer: C
Analysis: When EBGP establishes a neighbor, the TTL of the packet sent by default is 1, so it is necessary to set the hop-count of BGP to be greater than 2, so choose option C.
17. (Single-choice question) When a fault occurs, the fault can be classified to reduce the scope of fault location. Which of the following is not an interface configuration fault?
A. The duplex modes of the interfaces at both ends are inconsistent. B. The IP addresses conflict.
C. The interface certification is inconsistent. D. The receiving and receiving optical power at both ends is inconsistent.
Question answer: D
Analysis: because option ABC belongs to interface configuration faults, and option D should belong to hardware faults, so choose option D.
18. (Single-choice question) If you want to check the files under Flash, which command should you use?
A、dir sdl: B、dir sd0: C、display patch-information D、dir flash:
Question answer: D
Analysis: Because the command A dir sdl is to view the files under sdl, the command B dir sd0 is to view the files under sd0, and the command C is to view the system’s current startup command and next startup related configuration commands , option D dir flash This command is to view files under Flash. So choose option D. Here only part of the question bank is provided for you. If you are taking the HCIP exam, you can search for the VX applet [Zhuoying Education joinlabs] and you can easily brush up the questions on your mobile phone [package update is free]
19. (Single-choice question) Please match the commands with the implemented functions.
A、display device-④ Display version-① Display memory-usage-② Display cpu-usage-③
B、display device-③ Display version-② Display memory-usage-① Display cpu-usage-④
C、display device-① Display version-② Display memory-usage-③ Display cpu-usage-④
D、display device-② Display version-① Display memory-usage-③ Display cpu-usage-④
Answer to the question: A
Analysis: Because the display device command is used to check the board status, the Display version command is used to check the version information, the Display memory-usage is used to check the memory usage, and the Display cpu-usage is used to check the CPU usage, so choose option A.
20. (Single-choice question) As shown in the figure, the OSPF protocol is running between CE and PE. When CE1 advertises the route of this site to CE2. Which of the following descriptions is wrong?
A. When PE2 receives a BGP route from PE1 with a different Domain ID than the local one, PE2 will generate Type5 LSA or Type7 LSA for all LSAs
B. When PE2 receives the BGP route sent by PE1 with the same Domain ID as the local one, PE2 will generate Type3 LSA for Type1 LSA and Type2 LSA
C. When PE2 receives the BGP route sent by PE1 with the same Domain ID as the local one, for Type3 LSA, PE2 will generate Type5 LSA
D. The Domain ID configured on PE1 can be sent to PE2 along with the route as the extended community attribute of BGP
Question answer: C
Analysis: If the domain id is different, the two sites can be regarded as different ospf domains, then the routes received from the peer can be regarded as external routes, so they are injected into this site in the form of type 5 lsa and type 7 lsa Point, if the domian id is the same, then regard the two sites as different areas of the same ospf domain, and the type 1 lsa, type 2 lsa, and type 3 lsa received from the peer site are all in the form of type 3 lsa Injected, external routes are injected in the form of type 5 lsa and type 7 lsa. So choose option C.
21. (Single-choice question) During the establishment of an LDP session, the active party will first send Initialization information to negotiate parameters. If the passive party does not accept the negotiated parameters, it will send it.
A、Keepalive Message B、Initialization Message
C、Hello Message D、Error Notification Message
Question answer: D
Analysis: Because in the process of establishing an LDP session, the active party will first send Initialization information to negotiate parameters. If the passive party does not accept the negotiated parameters, it will send an Error Notification Message, so the correct answer is D.
22. (Single-choice question) As shown in the figure, MPLS LSP is configured in the network, and the goal is to establish an LDP session between SWA and SWB, then the following statement is correct
A. The configuration is correct B. MPLS does not need to be enabled globally
C. It is not necessary to enable MPLS on the port. D. The mp1s 1sr-id of the two devices cannot be configured the same
Question answer: D
Analysis: It can be seen from the title that the lsr-id of SWA and SWB conflict. If the lsr-id conflicts, the neighbor relationship of mpls cannot be established. And when configuring mpls, both the global and the interface need to enable the mpls and mpls ldp functions.
So the correct answer is D.
23. (Single-choice question) Regarding MP-BGP, which of the following descriptions is wrong?
A. When PE and CE exchange routes through BGP, a BGP process needs to be created for each VPN instance on CE
B. The packet type of MP-BGP and the policy of VPNv4 route distribution are the same as those of BGP-4
C. MP-BGP needs to allocate private network labels for VPNv4 routes
D. MP-BGP advertises VPNv4 routes through MP_REACH_NLRI and MP_UREACH_NLRI attributes
Answer to the question: A
Analysis: When exchanging BGP routes between PEs and CEs, PEs need to establish vpn instances for each CE to distinguish different CE routes, while CE devices only need to configure BGP normally without configuring VPN instances.
Therefore the answer is A.
24. (Single-choice question) By default, which of the following secure MAC address types will lose entries after the device restarts?
A. Black hole MAC address B. Sticky MAC address C. Secure dynamic MAC address D. Secure static MAC address
Question answer: C
Analysis: By default, the secure dynamic MAC address entry will be lost after the device is restarted, and the black hole, static mac, and sticky mac devices will not be lost after the device is restarted. So choose option C.
25. (Single-choice question) What is the command to adjust the link overhead value of IS-IS interface?
A、isis cost B、isis timer hello C、isis circuit-level D、isis circuit-type
Answer to the question: A
Analysis: The command to adjust the cost value of the IS-IS interface link is isis cost, sis timer hello is to modify the hello time of the interface, isis circuit-level is to modify the interface to the level type, and isis circuit-type is to modify the network type of the interface.
So the correct answer is A.
26. (Single-choice question) What is the purpose of configuring LSP fragmentation on IS-IS equipment?
A. Make the device unable to establish IS-IS neighbors B. Make the device support more IS-IS routing entries
C. Make the device unable to learn IS-IS routing information D. Without any practical purpose
Answer to the question: B
Analysis: Because the purpose of configuring LSP fragmentation on an IS-IS device is to enable the device to support more IS-IS routing entries, so choose option B. Here only part of the question bank is provided for you. If you are taking the HCIP exam, you can search for the VX applet [Zhuoying Education joinlabs] and you can easily brush the questions on your mobile phone [package update is free]
27. (Single-choice question) As shown in the figure, 0SPF is enabled on all interfaces of the router. The cost value of the link is marked in the figure. The Loopback0 interface of R2 advertises that it is in area 1, so the cost of R1 reaching 10.0.2.2/32 is?
A、200 B、150 C、50 D、100
Correct answer: A
Topic analysis: As can be seen from the topic, the loopback port of R2 is advertised in area 1, and both R1 and R2 belong to area 1. For R1, the route of the loopback port of R2 can be received from two directions, and one direction is R2 Send the loopback port route to R3 in the backbone area in the form of type 3 LSA, and then send it to R1 by R3. In the other direction, R2 directly sends it to R1 in the form of type 1 lsa. The priority of type 1 lsa is higher than that of type 3 lsa, so when R1 accesses the R2 loopback interface, it will use the route generated by type 1 lsa to access, choose the path R1-R2, and the cost is 200.
28. (Single-choice question) As shown in the figure, OSPF is enabled on all interfaces of the router. The IP address marked in the figure is the IP address of the Loopback0 interface of the device. Loopbac0 of RI, R2, and R3 are advertised in area 1, and Loopbacfk0 of R4 is advertised Loopback0 in area 0 and R5 advertises which functional addresses in area 2 can ping each other?
A, 10.0.3.3 and 10.0.5.5 B, 10.0.4.4 and 10.0.2.2
C, 10.0.2.2 and 10.0.3.3 D, 10.0.2.2 and 10.0.5.5
Question answer: C
Analysis: R3 in this figure is not an ABR, so it cannot generate three types of lsa, so the routing information of the loopback port of R5 cannot be sent to area 0 and area 1. R2 belongs to ABR and can generate three types of lsa to make area 0 and area 1 equipment interoperability. The loopback ports of R1, R2, and R3 are all in area 1, so they can ping each other. Therefore the answer is BC.
29. (Multiple choice) According to this picture, we can judge?
A. The system ID of R1 is ee8c.a0c2.baf1 B. R1 has both Level1-1 and 1ev-1-2 dimension road status information
C. R1 only has the link status information of Level1-2 D. In the Level1-2 network, there are a total of 8 road appliances
Answer to the question: A C
Analysis: This question looks at the lsdb of the R1 device. You can see that there is only a level 2 lsdb on R1. The following information can be obtained through lspid. The first part of lspid is the system id of the device. You can see that R1 is generated by four devices The lsps are ee8c.a0c2.baf1, ee8c.a0c2.baf2, ee8c.a0c2.baf3, ee8c.a0c2.baf4, and the lspid is: ee8c.a0c2.baf1.00-00*. lspid, so we can know that the systemid of R1 is ee8c.a0c2.baf1. Therefore the answer is AC
30. (Single-choice question) A Router LSA is shown in the figure, which of the following statements is wrong?
A. The Router ID of this router is 10.0.12.1 B. This router is DR
C. This router has established an adjacency relationship D. This router supports the import of external routes
Answer to the question: B
Analysis: The information described in this figure is a type 1 lsa generated by this device, and the type is router. ls id indicates the router id of the device, and adc rtr is the advertising router, which is also the router id of the device. Option: ABR E means the device is ABR, E means the device supports external routing. From the link tpye: transnet, it can be known that the link connected to this device is the MA network, link id indicates that the interface ip address of the DR interface of this MA network is 10.0.12.2, and data: 10.0.12.1 indicates that the interface ip address of the device connected to the DR is 10.0. 12.1, so 10.0.12.2 is the DR in this network, and this router is not the DR. Therefore the answer is B.
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