Huawei Huawei Certifications H12-891 Questions & Answers

• Question 391:

  Unlike STP, RSTP has only one BPDU type, its value is 2, and there is no TCN BPDU.

  A. TRUE

  B. FALSE

  Correct Answer: A

• Question 392:

  Is the following correct statement for the VXLAN message?

  A. The outer destination IP address is the IP address of the VTEP at the far end of the VXLAN tunnel

  B. The source UDP port number is 4789

  C. The destination UDP port number is 4789

  D. VNI has 24 T bits to distinguish the VIAN segment

  Correct Answer: ACD

• Question 393:

  As shown in the figure, all routing diagrams declare the loopback address in OSPF, where R2 does not return the address is 10022/32, it is advisable to tell AraD. The R3 loopback address is 10033/321001.1.0/24 external routing, in order to reduce the burden on the RI router, the configuration command is as follows:( Multiple choice questions)[Rlip ip-prefix 1 permit 001.1.024 [RLIJospfl [RL-ospf-1] filter-policy ip-prefix l import please ask the following description is correct?

  A. In the P route table of router R1, there is no external route to 1001.1.0/24

  B. In the IP routing table of router R1, there is an external route to 1001.1.0/24

  C. In the IP routing table of router R1, there is no loopback route to R2

  D. In the IP routing table of router RI, there is no loopback route to R3

  Correct Answer: ACD

• Question 394:

  As shown in the figure,

  

  in the context of IPv4 and IPv6, the SEL field in the NET address of the ISIS is always valued as 00?

  A. True

  B. False

  Correct Answer: A

• Question 395:

  If the topology of the entire network does not change, but the allocation of IP segments in the router changes, ISIS only uses PRC to calculate the changed routing information, and does not recalculate all SPT

  A. True

  B. False

  Correct Answer: A

• Question 396:

  What designs in the router can improve the reliability of the router?

  A. Dual power supply design

  B. Module hot-swappable design

  C. Issu Design

  D. Dual-engine design

  Correct Answer: AD

• Question 397:

  The following statement about the security alliance SA in IPSec is incorrect

  A. SA is uniquely identified by a triple that includes the security parametric reference SPI (Security Parameter Inder), the source IP address, and the security protocol number (AH or ESP)

  B. Use the display ipsec command to view the encryption algorithm used with another IPSec peer, the traffic of interest, and so on.

  C. IPSec only supports encrypting data using symmetric encryption algorithms.

  D. A two-way SA must exist between IPSec peers to establish an IPSec VPN connection

  Correct Answer: A

• Question 398:

  Level-1-2IS transmits Level-2LSP to the Level-1 area if the AT location 1 in Level-2LSP is delivered It means that the Level-1lS in the area can be accessed to the outer area through Level-1-2IlS

  A. True

  B. False

  Correct Answer: B

• Question 399:

  As shown in the figure, a company sets up an OSPF network. The links in the figure all form OSPF adjacencies, and all OSFP devices declare their own loopback addresses. One day SIR2 The two links of the S2AR1 suddenly failed, and in order to detect if the network was operating properly, the engineers performed a device status check, which is correct as described below

  

  A. R5 can normally learn the loopback route to R2

  B. R3 can not learn the loopback route to R2

  C. R1 can normally learn the loopback route

  D. R3 of R2 The loopback route of R2 can be learned normally

  Correct Answer: AB

• Question 400:

  In the VXLAN implementation, the mapping relationship between VNI and BD is

  A. 1:N

  B. N:1

  C. 1:1

  D. N: M

  Correct Answer: C