Huawei Huawei Certifications H12-891 Questions & Answers

• Question 381:

  As shown in the following figure, R1, R2, R3 establish a neighbor relationship of Level2 The IP routing table for R3 is correct (multiple choice).

  

  A. The 2::/64 route appears in the P route table

  B. The 2019:/64 route appears in the IP routing table

  C. 2020::/64 The route appears in the IP routing table

  D. The 2021/64 route will appear in the IP routing table

  Correct Answer: ABCD

• Question 382:

  Regarding how the device handles messages in the MPLS network model, what is the following description of the error?

  A. The label forwarding path LSP is determined and established by various protocols during the forwarding of messages. There is certainly no stripping of the label on the B

  B. LSR

  C. LER and LSR are labeled.

  D. For IP packets entering the MPLS domain, the device discards them.

  Correct Answer: A

• Question 383:

  The CPU was attacked by malicious traffic. Here are some of the following ways to prevent an attack: Multi-select

  A. USE CPCAR to rate limit messages sent up to the CPU according to the protocol type

  B. Speed limiting of messages sent to the CPu on the soil.

  C. Filter packets with AcL on the compromised router port

  D. Turn off the remote login function of the router.

  E. Analyze and count the packets sent to the CPU to find out the user of the attack source or the interface of the attack source.

  Correct Answer: CD

• Question 384:

  When you deploy LLQ, you need to configure bandwidth parameters, what is the significance of bandwidth parameters?( Single choice questions).

  A. Provides a built-in policer to limit the maximum available bandwidth of a low-latency queue during congestion

  B. The parameter should be as small as possible. It means that the bandwidth is always preserved, and even if the LLQ is set, changing the parameters will reduce the available bandwidth of the interface

  C. It represents a reference CIR to calculate the burst size D of the built-in tactician token bucket Changing parameters is an option because LLQ always takes precedence over other queues

  Correct Answer: A

• Question 385:

  What categories can ACLs be divided into? A. Advanced ACLs

  A. Two-layer ACL

  B. User-defined ACLs

  C. Basic ACL

  Correct Answer: ABC

• Question 386:

  To achieve an on-machine migration in the BGP EVPN distributed gateway scenario, which of the following messages is required?

  A. Type5

  B. Type4

  C. Typel

  D. Type2

  E. Type3

  Correct Answer: D

• Question 387:

  What is the following description of MPLS BGPVPN incorrect?

  A. The TTL field in the label has the effect of preventing loops.

  B. IBGP PEes generally use the Loopback interface address to establish a stable BGP neighbor relationship

  C. BGP So0, which is used to prevent routes issued from a VPN site from passing through the MPLS backbone and back to that site. So0 is an extended group attribute that MP-BGP automatically generates.

  D. The routing exchange between D. PE-CE can be static routing, OSPF multi-instance, IS- IS multi-instance, EBGP

  Correct Answer: C

• Question 388:

  The means of the LAND attack is that the attacker sends an SVN packet message with the same source and destination addresses to the target host, the source port and the destination port are the same, and the receiver waits for the final ACK packet to be sent , the connection is always in a semi-connected state, resulting in a full limited TCP reception Waste of resources

  A. True

  B. False

  Correct Answer: A

• Question 389:

  What check frames can IPSG set?

  A. Out of the interface

  B. MAC address

  C. IP address

  D. VLAN ID

  Correct Answer: BCD

• Question 390:

  As shown in the figure, in the HUB and Spoke networking mode of MPLS BGPVPN, in order to achieve the division can only communicate with the headquarters, the division can not communicate with each other When setting up RT, which of the following scenarios is this?( Radio).

  

  A. import Target:12:3EpodTarget:12:3

  B. Headquarters: importTarget:1:1EpodTarget:3:3

  C. Headquarters: Impot Target:2:2; Expor Target:3:3

  D. Headquarters: importTarget: 12:3EpodTarget: 3:12

  Correct Answer: D