Huawei Huawei Certifications H12-891 Questions & Answers

• Question 31:

  Users within a typical VPN can only communicate with each other, not with Internet users, and with Internet. But VPN individual sites may have access to internet's needs. The correct description of the implementation of VPN interconnection with internet is ?( Multiple choice questions).

  A. is implemented on the user side, and the CE is directly connected to the Internet. Each user site can be connected to the Internet separately, that is, the CE of each site is configured with a default route to the Internet.

  B. Implementing a complex implementation on PE and having security implications, PE devices may be subject to Dos attacks on the Internet.

  C. Implemented on PE, the PE device issues a default route to the CE to the Internet and adds a default route to the VPN instance routing table pointing to the Internet Gateway o

  D. Implemented on the user side, the implementation method is simple, and the public network and private network routes are isolated, safe and reliable.

  Correct Answer: ABCD

• Question 32:

  Which of the following parameters are not required when configuring BGP Peers?

  A. as-number

  B. password

  C. peer IP Address

  D. Description

  Correct Answer: BD

• Question 33:

  The following description of LDP reliability is incorrectly ?( Radio).

  A. LGP GR takes advantage of the high difference between the LS forwarding plane and the control plane to realize that the device forwards without interruption when the protocol is restarted or the master-standby is reversed

  B. Manually configured LDP FRR policies default to 32-bit backup routes that trigger LDP to establish backup LSPs

  C. LLDPFRR also allows LSPs to be generated for tag mappings from non-optimal next hops, and as a live LSP backup, supervising forwarding table entries

  D. LDP and IGP linkage, the need for IGP has been routed to release, to ensure that LDP and LGP path consistent

  Correct Answer: B

• Question 34:

  What is the field that the IPv6 header has similar to the IPv4 header "Type of Service" field?

  A. Version

  B. Flow Label

  C. Next Header

  D. Traffic Class

  Correct Answer: D

• Question 35:

  ?? ipIp- prefoi p prefierame lndeindeoxrunmber)( pemit demy)ip+4adrssmasklengh gratrequa grater-cqual abel]lescqualesequl ole) for ?Pprefofiier? If a pre-list of tooequal has been specified, but the greater-equal has not been specified, then how much of the prefix's range is sufficient?(). Radio neck).

  A. [0, less-equal-value]

  B. [mask-length, less-equal-value]

  C. [less-equal-value,32]

  D. No limit

  Correct Answer: B

• Question 36:

  Router HW1 exists in the carrier HW's network as an MPLSLSR router. The router receives a packet carrying a label, but the label entry does not exist in its LFIB. So how does the router handle that message?

  A. Router HW1 strips off the label and looks for the FIB using the P destination address

  B. Router HW1 uses LDP to create an LSP and creates a new path in LFIB for the label carried in the message

  C. Router HW1 drops the message

  D. Router HW1 will forward the message with the default label

  Correct Answer: C

• Question 37:

  MACsec provides users with secure MAC layer data sending and receiving services. Which of the following is not a service available by ACsec?

  A. User data encryption

  B. Data source authenticity verification

  C. Integrity check

  D. Controllability check

  Correct Answer: D

• Question 38:

  Which nationality meets the following two conditions: 1] BGP Router A can choose whether the Ulpdate message is based on the nationality. ( ) If Router B receives a Updae message containing a cross-hatch, run-by B does not have an identified solidity, but will also contain a multifaceted] Ulpdate retracts the advertisement to Router C. Router C may recognize and apply this attribute. (Multiple choice questions).

  A. Aggregator

  B. Local_Pref

  C. Multi_Exit_Disc

  D. Community

  Correct Answer: AD

• Question 39:

  DHCPv6 servers support additional configuration information such as DNS server addresses for hosts.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 40:

  The message types of ISIS mainly include SNP, IIH, and LSP

  A. True

  B. False

  Correct Answer: A