H12-221 : HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network) : Part 11

H12-221 : HCNP-R&S-IERN (Huawei Certified Network Professional-Implementing Enterprise Routing Network) : Part 11

1. The vlink-peer command is used to specify a peer IP address for setting up a virtual link.

   • TRUE
   • FALSE

2. How does a BGP router process a received route whose next hop is unreachable?

   • The BGP router sends an error message to the router that has sent the update message.
   • The BGP router accepts the route and adds it to the BGP routing table. This route, however, is neither preferred nor added to the IP routing table for packet forwarding.
   • The BGP router refuses the route.
   • The BGP router accepts the route and adds it to the BGP routing table. This route participates in route selection and may be selected as the optimal route to be added to the IP routing table for packet forwarding.

3. A company reserves the network segment 172.29.100.0/26 for some remote small-scale sites. Each site has 5 IP devices to connect to this network segment. Which of these Variable Length Subnet Masks (VLSMs) can be used to accommodate the need for minimum number of hosts?

   • /27
   • /28
   • /29
   • /30

4. ACL rules are matched based on the configured order only.

   • TRUE
   • FALSE

5. An OSPF neighbor relationship fails to establish and the OSPF error information is displayed as follows. Which of the following is most likely the cause?

   

   • Router IDs conflict.
   • Area IDs are mismatched.
   • Network masks are inconsistent.
   • Authentication types are inconsistent.

6. The peer connect-interface” command is recommended to establish peer relationships between two routers connected through “multiple” links.

   • TRUE
   • FALSE

7. Which of the following protocols support default route advertisement? (Select 3 answers)

   • RIP
   • OSPF
   • BGP
   • Static

8. The most remarkable characteristic of OSPF is that it can support the link-state algorithm.

   • TRUE 
   • FALSE

9. Which of the following methods are supported by OSPF for delivering default routes? (Select 3 answers)

   • Delivery using an ABR
   • Delivery using a backbone router
   • Forcible delivery
   • Non-forcible delivery

10. Which of the following statements about a neighbor state machine is true?

    • The Attempt state appears only on an NBMA network or a broadcast network.
    • The Attempt state appears only on an NBMA network or a P2MP network.
    • LSR packets can be sent in the Exchange state.
    • The Full state indicates that LSDB synchronization is complete. No LSDB information will be exchanged.

11. Which of the following statements regarding the Reverse Path Forwarding (RPF) mechanism are

    true? (Select 2 answers)

    • Multicast RPF does not depend on unicast routing.
    • All multicast protocols adopt the RPF mechanism.
    • A router discards the received multicast packets if the RPF check fails.
    • The RPF mechanism has two functions: It prevents multicast routing loops and the forwarding of redundant multicast packets.

12. Which of the following multicast protocols can generate multicast distribution trees?

    • MBGP
    • MSDP
    • IGMP
    • PIM

13. Which of the following BGP attributes is an optional transitive attribute?

    • ORIGIN
    • AS_PATH
    • NEXT_HOP
    • MED
    • LOCAL_PREF
    • COMMUNITY

14. OSPF directly runs over the IP protocol as protocol number 89.

    • TRUE 
    • FALSE

15. Which of the following statements are correct regarding how OSPF detects old or duplicate LSAs? (Select 3 answers)

    • The lower the sequence number, the more recent the LSA.
    • The smaller the LS age, the more recent the LSA.
    • A router uses 0x80000001 as the sequence number when it generates the first LSA.
    • An LSA can be flushed from the routing domain by setting its LS age to equal the Maxage.

16. A broadcast and an NBMA network, each having two or more routers, must have both DR and BDR.

    • TRUE
    • FALSE

17. Which of the following statements belong to BGP community attribute? (Select 3 answers)

    • NO_EXPORT
    • NO_ADVIERTISE
    • LOCAL_EXPORT_SUBCONFED
    • NO_BROADCAST

18. What is the maximum number of bits that can be used for subnetting, when the netork address is a Class C address?

    • 6
    • 8
    • 12
    • 14

19. A failure in establishing a BGP connection can be addressed by checking the TCP connectivity and BGP peer configurations.

    • TRUE
    • FALSE

20. One route-policy may have several nodes with each node containing a node ID. Each node may also have multiple “if-match” and “apply” clauses. Which of the following statements are true? (Select 2 answers)

    • Different nodes are in an OR relationship. 
    • Different nodes are in an AND relationship.
    • If-match clauses of a node are in an AND relationship, 
    • If-match clauses of a node are in an OR relationship.

21. Which of the following statements regarding comparison between ACL and IP-Prefix are true? (Select 2 answers)

    • Both ACL and IP-Prefix can perform route filtering
    • Both ACL and IP-Prefix can perform data packet filtering
    • ACL can perform data packet filtering and route filtering, but IP-Prefix can only perform route filtering
    • IP-Prefix can perform data packet filtering and route filtering, but ACL can only perform route filtering

22. What are the advantages of subnetting? (Select 2 answers)

    • Isolating broadcast traffic 
    • Improving network QoS
    • Increasing the IP address usage
    • Improving network reliability

23. Which of the following BGP attributes can prevent routing loops? (Select 3 answers)

    • Originator_ID
    • Aggregator
    • Cluster_List
    • AS-Path

24. Which of the following BGP attributes cannot be advertised to other neighboring AS?

    • LOCAL_PREF 
    • AS_PATH
    • COMMUNITY
    • ORIGIN

25. Which of the following BGP attributes are well known mandatory attributes? (Select 3 answers)

    • ORIGIN
    • AS_PATH
    • NEXT_HOP
    • MED
    • LOCAL_PREF
    • COMMUNITY