H12-891

H12-891 practice questions, page 4 of 22, with answer review and explanations.

Question 16

In the SSH algorithm negotiation phase, the SSH server and client exchange the list of algorithms that hey support. The list of symmetric encryption algorithms of the SSH server is as follows: aes256-ctr, aes192-ctr, aes128-ctr, and aes256-cbc. The list of symmetric encryption algorithms of the SSH client is as follows: aes128-ctr, aes192-ctr, aes256-ctr, and aes256-cbc. Which of the following symmetric encryption algorithms can be used by both the SSH server and client?

  1. aes256-ctr
  2. aes192-ctr
  3. aes128-ctr
  4. aes256-cbc

Question 17

YANG is a data modeling language. Which of the following statements is incorrect about YANG?

  1. The YANG model is presented as a .yang file.
  2. The YANG model can be converted to an XML syntax-based YANG Independent Notation (YIN) model without any loss.
  3. YANG is a modular language representing data structures in a hierarchical tree format.
  4. YANG only supports built-in data type, while extended data types are not allowed.

Question 18

SR-MPLS is enabled on all routers. The label information encapsulated by R1 into a data packet is shown in the figure. Which of the following MPLS labels is carried in the data packet when it is sent from R2 to R4?

  1. 2032
  2. 2024
  3. 2046
  4. No label

Question 19

Which of the following types of LSAs does OSPF use to support SR-MPLS?

  1. Type10 Opaque LSA
  2. Type1 Router LSA
  3. Type2 Network LSA
  4. Type7 NSSA External LSA

Question 20

Which of the following rules does not apply to SR-MPLS Policy design?

  1. Associate service traffic with tunnels to achieve some degree of path visualization.
  2. Ensure that the traffic on each tunnel is not too heavy. Otherwise, bandwidth optimization will be difficult.
  3. Deploy as many tunnels as possible, as more tunnels result in more refined service isolation and service quality assurance.
  4. Consider possible network expansion in the future.