H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 08

H12-261 : HCIE-R&S (Written) (Huawei Certified Internetwork Expert-Routing & Switching) : Part 08

1. If host HW1 on the network wants to join a video conference, what will the host do?

   • The host multicasts an IGMPv2 Membership Report message that carries the expected multicast address to the local network.
   • The host multicasts an IGMPv2 Membership Report message with the multicast address for all PIM routers (224.0.0.2) to the local network.
   • The host unicasts an IGMPv2 Membership Report message to the default router on the local network.
   • The host unicasts an IGMPv2 Membership Report message to the RP.

2. Which of the following statements correctly describes the corresponding MPLS TTL processing mode?

   • On an MPLS VPN, if the structure of the MPLS backbone network needs to be shielded, the Uniform mode is recommended for VPN packets.
   • In Uniform mode, when IP packets enter an MPLS network, the ingress node decrements the IP TTL by one and the MPLS TTL field has a fixed value.
   • The TTL field in an MPLS label serves the same function as that in an IP packet header. That is, the TTL is used to prevent loops on an MPLS network.
   • In Pipe mode, when IP packets enter an MPLS network, the ingress node decrements the IP TTL by one and copies this new value to the MPLS TTL field.

3. Which of the following statements regarding CE dual-homing features is false?

   • The VRFs of two PEs connected to the same CE can belong to different VPNs.
   • In the CE dual-homing networking, loops may occur. You can use route-tag resolve this issue.
   • A CE dual-homing network where a CE is connected to two PEs ensure high network reliability.
   • A CE connects to the backbone network through two links that work in load balancing or primary/secondary mode.

4. Level-1-2 IS can transmit Level-2 LSPs to a level-1 area. If the ATT bit in the Level-2 LSPs is set to 1, the Level-1 IS in the area can communicate with devices in other areas through the Level-1-2 IS.

   • TRUE
   • FALSE

5. A network administrator is planning to use an automatic 6to4 tunnel to transmit IPv6 network. If the IPv4 address of the router interface is 138.14.85.210, the corresponding tunnel address should be 2001:8a0e:55d2:1:230:65ff:fe2c:9a6.

   • TRUE
   • FALSE

6. Two community filters are configured as follows:

   ip community-filter 1 permit 100:1 200:1
   ip community-filter 2 permit 100:1
   ip community-filter 2 permit 200:1

   Which of the following statements regarding the community filters are true? (Choose two.)

   • A BGP route matches community-filter 2 only when it carries the Community attribute values of 100:1 and 200:1.
   • A BGP route matches community-filter 1 only when it carries the Community attribute value of 100:1 or 200:1, or both.
   • A BGP route matches community-filter 1 only when it carries the Community attribute values of 100:1 and 200:1.
   • A BGP route matches community-filter 2 only when it carries the Community attribute values of 100:1 and 200:1, or both.

7. Which of the following statements regarding RD filters are true? (Choose two.)

   • The relationship between the rules of an RD filter is “OR.”
   • If an RD filter is configured but the RD of routes does not match any RD defined in the RD filter, the default matching result is “permit.”
   • Routes are filtered according to the configuration order of multiple rules.
   • If an RD filter is not configured but used to filter routes, the matching result is “deny”.

8. Which of the following statements is true regarding the domain authentication mode md5 hello command in the IS-IS process?

   • This command enables IS-IS Hello PDUs to carry authentication information.
   • IS-IS SNP and LSP can be flooded normally only when the domain authentication mode and password of all routers in the same routing domain are MD5 and hello.
   • IS-IS authentication cannot be applied to IPv6 environments.
   • Routing domain authentication enables Level-1 and Level-2 SNPs and LSPs to carry authentication information.

9. Which of the following statements regarding OSPFv3 are true?

   • The LSAck packet contains the LSA header information, which is used for acknowledging the receipt of an LSA.
   • The Hello packet must contain interface ID of sending interface.
   • The Option field of Hello and DD packets is extended to 24 bits.
   • The LSR packet contains the complete LSA header information, which is used for request updating LSAs.

10. If an ABR is a Type 5/7 LSA translator in an NSSA, the ABR can aggregate Type 5 LSAs converted from Type 7 LSAs.

    • TRUE
    • FALSE

11. Which of the following statements regarding BGP route reflectors (RRs) are true?

    • An RR advertises routes learned from a client to all connected non-clients and clients.
    • A backbone network is divided into multiple reflection clusters. Each RR is configured as a non-client of the other RR, and establishes full-mesh IBGP connections with each other.
    • Cluster_List is an optional non-transitive attribute and is used to prevent loops in a cluster.
    • The Originator_ID attributes is generated by an RR to prevent loops between clusters.

12. When router R1 runs OSPF and they display ip routing-table command is executed on R1 to check the routing table, which of the following statements regarding OSPF information in the routing table is true?

    • In the routing table, the routing entries identified by the O_ASE identifier can be learned only through route import.
    • In the routing table, the routing entries identified by the OSPF identifier can be learned through Type 1/2/3/5 LSAs.
    • A. In the routing table, the routing entries marked OSPF can be learned only through Type 1 LSAs.
    • A. In the routing table, the routing entries identified by the OSPF identifier can be learned only through Type 3 LSAs.

13. IS-IS elects a DIS on a broadcast network. Which of the following statements regarding DIS are true? (Choose three.)

    • DIS preemption is supported. After successful DIS preemption, LSPs do not need to be flooded.
    • IS-IS elects the DIS by comparing preferences. If the preferences are the same, IS-IS compares MAC addresses.
    • On a broadcast network, the DIS sends Hello PDUs at a frequency that is three times the frequency of non-DIS routers.
    • The DIS periodically sends CSNPs to ensure LSDB synchronization.

14. In which scenarios can an AS-Path-filter be used? (Choose three.)

    • apply clause in a route-policy
    • Filtering routes received from BGP peers based on the AS_Path attribute. For example, the peer X.X.X.X as-path-filter import command.
    • if-match clause in a route-policy
    • Filtering routes sent to BGP peers based on the AS_Path attribute. For example, the peer X.X.X.X as-path-filter export command.

15. Routers R1 and R2 run BGP. Both the routers reside in AS 65234. Routes of R2 exist in the BGP routing of R1 but do not exist in the IP routing table of R1. What is the cause of this problem?

    • BGP is disabled on both R1 and R2.
    • Multi-hop BGP is disabled on R1.
    • The routes are not optimal.
    • The BGP peer relationship between R1 and R2 is in Down state.

16. As shown in the figure, in IPv4 and IPv6 environments, the value of the SEL field in the IS-IS NET address is always 00.

    

    • TRUE
    • FALSE

17. In the figure, the first record shows an LSP in the LSDB of a router, and the second record shows a newly received LSP. Which of the following statements is false?

    

    • The router adds the newly received LSP to the LSDB.
    • The router will ignore the LSPs received from neighbors.
    • The router sends PSNPs if it is a point-to-point network.
    • If it is a broadcast network, the DIS adds the summary information of the newly received LSP to the next CSNP.

18. Which of the following statements about BGP load balancing are false? (Choose three.)

    • The AS_Path attribute values of equal-cost routes for load balancing must be different.
    • When BGP load balancing is implemented, the local device can change the next-hop address of routes to its own address when advertising the routes to IBGP peer groups only if the peer next hop-local command is configured.
    • Load balancing can be implemented among BGP routes with different origins but having the same destination network segment.
    • Load balancing can be implemented among IBGP routes and EBGP routes having the same destination on the public network.

19. BGP can automatically summarize only routes with the Origin attribute being Incomplete.

    • TRUE
    • FALSE

20. Which of the following statements route import is false?

    • Importing IBGP routes into the OSPF process may cause routing loops.
    • By default, the metric of external routes imported into the OSPF process is 1 and the type of imported external routes is Type 2.
    • BGP can generate routes in either Import or Network mode. The Network mode is more precise than the Import mode.
    • After IS-IS Level-2 routes are imported to an IS-IS Level-1 area, routing loops occur if no route import policy is manually configured.