Huawei Huawei Certifications H12-891 Questions & Answers

• Question 401:

  Which of the following BGP attributes is not required in the Update message for a BGP route?

  A. WITH

  B. Local-Preference

  C. AS_PATH

  D. Origin

  Correct Answer: AB

• Question 402:

  The following description of BGP loop protection is correct: multi-select

  A. Any routing information from an IBGP peer is advertised to the other IBGP peers

  B. Any update information received from the EBGP peer that contains its own AS number in the AS-PATH attribute is discarded via the AS-PATH attribute

  C. Non-RR BGP routers do not announce any updates from IBGP peers to other IBGP peers

  D. BGP routers do not announce any slaves The EBGP peer comes to update the information to its EBGP peer

  Correct Answer: BC

• Question 403:

  The following statement about the VXLAN gateway is incorrect?( Single choice questions).

  A. Layer 2 gateway: Used to solve the problem of tenant access to the VXLAN virtual network, and can also be used for subnet communication of the same VXLAN virtual network.

  B. Layer 3 gateway: Used for cross-subnet communication of the VXLAN virtual network and access to external networks.

  C. VXLAN Layer 3 gateways can be divided into centralized gateways and distributed gateways.

  D. Layer 2 gateway and VPN instance binding.

  Correct Answer: D

• Question 404:

  Regarding the sliding window of TCP, what are the following descriptions that are enough to be wrong? ( Multiple choice question)

  A. The sender declares the initial window size

  B. The sender does not need to transmit messages of full window size

  C. The TCP sliding window allows multiple packets to be sent before an acknowledgment is received

  D. After the retransmission timer times out, the sender has not received an acknowledgment and will retransmit unacknowledged data

  E. The receiver needs to acknowledge the sender's packet

  F. Sliding window size can only be increased or remain unchanged

  Correct Answer: AF

• Question 405:

  The following statements about the VRRP protocol are correct (multiple choice).

  A. Both VRRPv2 and VRRPv3 support authentication

  B. VRRPv3 does not support authentication, while VRRPV2 does

  C. VRRPv2 only applies to IPv4 networks, and VRRPv3 only applies to IPv6 networks

  D. The owner of the Master IP address has a VRP priority of 255, and all configurable priorities range from 0 to 254

  Correct Answer: B

• Question 406:

  Which of the following is the benefit of VLAN aggregation?

  A. Implements isolation of broadcast domains between Sub-VLANs

  B. Reduce the waste of IP addresses

  C. Increased number of available VLANs

  D. Increased flexibility in addressing

  Correct Answer: ABD

• Question 407:

  Configure queue-based traffic shaping, which defaults to tailing if the queue length exceeds the cache size

  A. True

  B. False

  Correct Answer: A

• Question 408:

  The MAC address of a PC is 5489-98FB-65D8 The administrator wants this PC to get the specified P address 1921681.11/24 from the DHCP server So the administrator-configured command should be,

  A. dhcp static-bind ip address 1921681.11 mac- address 5489-98FB-65D8

  B. dhcp static-bind ip address 1921681.11 24 mac- address 5489-98FB-65D8

  C. dhcp server static -bind ip address 1921681.112552552550 mac-address 5489-98FB- 65D8

  D. dhcp server static-bind ip-address 1921681. 11 mac- address 5489-98FB-65D8

  Correct Answer: D

• Question 409:

  Configuring filter-policy 2000 export in the IS-IS process, the wrong statement about the function of the command is ?

  A. which needs to be used in conjunction with route ingestion, acts as an external route sender neighbor that only partially introduces.

  B. If you do not configure this command, the device will by default introduce the external routing protocol to the IS-IS route all outgoing

  C. Restricts the external publication of route entries generated by the device itself

  D. This command will filter the link status information released to the outside world

  Correct Answer: D

• Question 410:

  As shown in the figure, a company wants to achieve secure mutual access between the head office and branches through MPLSVPN, and at the same time requires that the IPN traffic of the branch bank must be forwarded through the head office to achieve traffic monitoring

  

  A. VPN routing information can be exchanged between A. CE and PE using BGP messages

  B. When Hub-CE passes routing information with Hub-PE, you need to configure a route on Hub-PE that allows receiving AS numbers to be repeated 1 time to receive routes published by Hub-CE

  C. Between Hub-CE and Hub-PE, and between Spoke-PE and Plan-CE, routing information can be exchanged using the OSPF protocol

  D. An MP-IBGP peer relationship is established between Spoke-PE and THE VPN routing information is exchanged.

  Correct Answer: D