Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 491:

  Regular expressions can be used for Community-filter and AS-path-filter attribute type definitions for route filtering.

  A. True
  B. False
  A. True

• Question 492:

  Users hope to make the router forward and select packets according to their own defined policies on the basis of traditional route forwarding, and can adopt policy routing. Which of the following description about policy routing is incorrect?

  A. Policy routing can set the next-hop IP address
  B. Policy routing cannot be set in the next statement DSCP
  C. Policy routing cannot be used to set IP precedence
  D. Policy-based routing can be used to match packet lengths
  C. Policy routing cannot be used to set IP precedence

• Question 493:

  In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following statements about symmetric IRB forwarding are correct? (Choose two)

  A. Both the ingress VTEP and egress VTEP forward packets based on the Layer 3 forwarding table.
  B. The ingress VTEP forwards packets based only on the Layer 2 forwarding table.
  C. The egress VTEP forwards packets based only on the Layer 2 forwarding table.
  D. When VTEPs forward inter-subnet user communication packets, the VNI carried in the VXLAN header is the L3VNI.
  A. Both the ingress VTEP and egress VTEP forward packets based on the Layer 3 forwarding table.
  D. When VTEPs forward inter-subnet user communication packets, the VNI carried in the VXLAN header is the L3VNI.

• Question 494:

  SNMPv3 defines which security features: (Choose two)

  A. Privacy
  B. Authentication
  C. Domain checking
  D. Accounting
  A. Privacy
  B. Authentication

  ---

  Explanation

• Question 495:

  In the evolution from IPv4 networks to IPv6, several transition technologies have emerged. Which of the following are common types of transition technologies? (Choose four)

  A. Dual-stack technology
  B. Tunneling technology
  C. Compatibility technology
  D. Conversion technology
  A. Dual-stack technology
  B. Tunneling technology
  C. Compatibility technology
  D. Conversion technology

• Question 496:

  What does the RT (Route Target) do in an MPLS VPN? (Choose two)

  A. Allows the peer PE to decide which VPNv4 routes to import into a particular VRF
  B. Allows the peer PE to decide which VPNv4 routes not to import into a particular VRF
  C. Allows the peer CE to decide which VPNv4 routes to import into a particular VRF
  D. Allows the peer CE to decide which VPNv4 routes not to import into a particular VRF
  A. Allows the peer PE to decide which VPNv4 routes to import into a particular VRF
  B. Allows the peer PE to decide which VPNv4 routes not to import into a particular VRF

  ---

• Question 497:

  Which of the following statements is incorrect about intranet security design for a large or medium-sized virtualized campus network?

  A. In addition to terminal access security, interface security must be considered during wireless network security design.
  B. Traffic suppression can be configured on the wired network to block broadcast traffic by shutting down interfaces.
  C. To secure data transmission, the CAPWAP tunnel between the AC and AP supports DTLS encryption.
  D. Intranet security refers to both wired and wireless network security.
  B. Traffic suppression can be configured on the wired network to block broadcast traffic by shutting down interfaces.

• Question 498:

  As shown in the figure, a company sets up an OSPF network. The links in the figure all form OSPF adjacencies, and all OSPF devices declare their own loopback addresses. One day, the two links of S2 and R1 suddenly failed. In order to detect if the network was operating properly, the engineers performed a device status check, which of the following descriptions are correct? (Choose two)

  

  A. R5 can normally learn the loopback route to R2.
  B. R3 cannot learn the loopback route to R2.
  C. R1 can normally learn the loopback route.
  D. R3 can normally learn the loopback route of R2.
  A. R5 can normally learn the loopback route to R2.
  B. R3 cannot learn the loopback route to R2.

  ---

  Explanation

• Question 499:

  Which of the following statements about a BGP confederation is correct?

  A. A confederation divides an AS into sub-AS, and external ASes still consider the confederation as a single AS.
  B. Sub-ASes within a confederation can use private AS numbers. On Huawei NE/AR routers, a confederation can be configured with up to 32 sub-ASes.
  C. A confederation can easily detect routing loops within the AS because EBGP is running between the sub-ASes.
  D. The sub-AS number of the confederation, by default, notifies BGP peers outside the confederation.
  D. The sub-AS number of the confederation, by default, notifies BGP peers outside the confederation.

  ---

• Question 500:

  FILL IN THE BLANK

  Refer to the exhibit, SR-MPLS is enabled on R1, R2, and R3. The SRGB (Segment Routing Global Block) range on R3 is from 20000 to 21000, and the prefix SID index configured on the loopback1 interface of R3 is 30.

  In this case, the MPLS label corresponding to the loopback1 interface of R3 is _____. (Enter an Arabic numeral without symbols.)

  

  20030