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Home Huawei H12-891

Huawei H12-891 Exam Practice Questions (P. 3)

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Question #21
A VPDN is a VPN constructed on a public network. Which of the following is a VPDN?
  1. A
    L2TP
  2. B
    VPLS
  3. C
    GRE VPN
  4. D
    IPsec

Correct Answer:
A

Question #22
On a medium-sized network configured with BGP, two RRs are typically deployed to improved BGP RR reliability. Typically, the cluster IDs of the two RRs are set as the same. Which of the following is the reason for that?
  1. A
    To prevent loops.
  2. B
    To prevent sub-optimal routes.
  3. C
    To prevent memory insufficiency caused by receiving too many routes on RRs.
  4. D
    To prevent memory insufficiency caused by receiving too many routes on clients.

Correct Answer:
B

Question #23
Which of the following BGP route attributes cannot be used to control BGP route selection?
  1. A
    Community
  2. B
    AS_Path
  3. C
    MED
  4. D
    Originator ID

Correct Answer: A ?️

Question #24
Which of the following fields is added to BGP4+ Update packets to advertise IPv6 routes?
  1. A
    A new NLRI type: IPv6_NLRI, which carries the IPv6 NLRI prefix length and IPv6 NLRI prefix.
  2. B
    A new path attribute: MP_REACH_NLRI
  3. C
    A new path attribute: IPv6_REACH_NLRI
  4. D
    A new path attribute: MP_UNREACH_NLRI

Correct Answer:
B

Question #25
On the network shown, an engineer uses two routers to test IPv6 services by running BGP4+ to simulate the communication between the enterprise headquarters and a branch. The engineer checks an Update message sent by R1. Which of the following statements about the message information is correct?

  1. A
    The route described in the message may be imported using the import command.
  2. B
    The message describes a withdrawn IPv6 route.
  3. C
    The next-hop address of the route described in the message is 2001:db8:2345:l::l.
  4. D
    The route address prefix (including the prefix length) described in the message is 2001:db8:2345:1::1/128.

Correct Answer:
D

Question #26
In BGP4+, what is the content of the next hop network address field carried in the MP_REACH_NLRI attributed of an Update packet?
  1. A
    It must be a link-local address.
  2. B
    It must be a global unicast address.
  3. C
    It can be only a link-local address.
  4. D
    The link-local address and global unicast address can be carried at the same time.

Correct Answer:
D

Question #27
Which of the following operations is not involved in the middle phase of a migration?
  1. A
    Service test
  2. B
    Migration preparation
  3. C
    On-site monitoring
  4. D
    Migration implementation

Correct Answer:
C

Question #28
Which of the following statements is incorrect about a BGP/MPLS IP VPN?
  1. A
    A BGP/MPLS IP VPN consists of customer edges (CEs), provider edges (PEs), and providers (Ps). PEs and Ps are carrier devices, whereas CEs are BGP/MPLS IP VPN customer devices.
  2. B
    Inter-site communication can be implemented through VPN. A site can only belong to only one VPN.
  3. C
    In most cases, CEs are unaware of VPNs and do not need to support MPLS or MP-BGP.
  4. D
    Ps only need to provide basic MPLS forwarding capabilities and do not need to maintain VPN-related information.

Correct Answer:
B

Question #29
As shown in the following figure, what is known about the default routes on R4?
  1. A
    One default route
  2. B
    Two equal-cost default routes
  3. C
    Two default routes with different costs
  4. D
    Four equal-cost default routes

Correct Answer:
B

Question #30
Which of the following security protection actions is not used to safeguard MAC addresses?
  1. A
    Restrict
  2. B
    Protect
  3. C
    Re-mark
  4. D
    Shutdown

Correct Answer:
C

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