Huawei Huawei Certifications H12-891 Questions & Answers

• Question 121:

  Dual-bucket, two-speed is used in traffic governance, where the number of tokens in a C bucket is TC and the number of tokens in a P bucket is TP. When a message of length B enters, which of the following sentences is correctly described? (Multiple choice questions).

  A. If TP-B~O and TC-B < 0, the message is marked green

  B. If TP-B<0 and TC-B-0, the message is marked in red

  C. If TP-B>0 and TC-B < 0, the message is marked yellow

  D. If TP-B >O and TC-B > 0, the message is marked as a green

  Correct Answer: BCD

• Question 122:

  What are the benefits of using WRED?( Multi-select)

  A. Provides some low latency

  B. Avoid TCP global synchronization

  C. Avoid congestion completely

  D. Provides a small bandwidth guarantee

  E. Can avoid UDP occupying most of the bandwidth when congested

  Correct Answer: C

• Question 123:

  Regarding the tag space for MPLS, the description is incorrect

  A. When the penultimate hop LSR performs a label swap, if the swapped tag value is found to be

  B. the tag is popped up by default and the message is sent to the last hop

  C. Above 1024 is the tag space shared by dynamic signaling protocols such as LDP, RSVP-TE, MP-BGP, etc

  D. 16-1023 is a label control shared by static LSPs and static CR-LSPs

  Correct Answer: B

• Question 124:

  What parameters can the DHCPv6 server assign to DHCPv6 clients?

  A. SNTP server address

  B. IPv6 address/prefix

  C. Gateway address

  D. DNS server address

  Correct Answer: ABCD

• Question 125:

  What commands are related to BGP route reflectors?( Multiple select).

  A. reflect between-clients

  B. group 1 internal

  C. peer reflect-client

  D. reflector cluster-id

  Correct Answer: ACD

• Question 126:

  VPN instances are also known as VPN routing forwarding tables (PN Routing and Forwarding table), and there are multiple route forwarding tables on the PE, including a public route forwarding table, one or more VPN route forwarding tables, and VPNv4 Route forwarding table.

  A. False

  B. TRUE

  Correct Answer: B

• Question 127:

  A company deployed SSM multicast, in order to save the bandwidth consumption of multicast data in the LAN, the network administrator made the following configuration on the switch

  A. True

  B. False

  Correct Answer: B

• Question 128:

  In a data communication session between two hosts, which level does the session layer of the oSI model of the host on one end communicate with the osl mode of the host on the other end?

  A. Communicate with the conversation layer on the other end B Communicate with the application layer at the other end

  B. Communicate with the data link layer at the other end

  C. Communicate with the physical layer at the other end

  D. Communicate with the presentation layer at the other end

  Correct Answer: A

• Question 129:

  The following description of the characteristics of Huawei device Eth-trunk link aggregation is correct?

  A. Link aggregation enables load balancing based on data TCP or UDP ports

  B. Link aggregation cannot be deployed across devices

  C. Link aggregation can be applied to Both Layer 2 and Layer 3 devices

  D. Link aggregation can only be applied to Layer 2 devices.

  Correct Answer: C

• Question 130:

  NXLAN under different VPNs need to be accessed, one of the subnets is as follows, EVPN under RT 10: 10 both, RT 1000: 1000 export, VPN RT 100: 100 The other subnet can be configured as ?

  A. Vpn configure 1000:1000 both evpn

  B. EVPN configures 1000:1000 both

  C. Configure 1000:1000 export under EVPN

  D. Configure 10:10 both under VPN.

  Correct Answer: AB