Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 241:

  Which of the following are potential risks in HTTP communication? (Choose three)

  A. Eavesdropping: Third parties can obtain communication data.
  B. Pretending: Third parties can impersonate another user.
  C. Tampering: Third parties can modify communication data.
  D. Lost: There is a low probability that data is lost during transmission.
  A. Eavesdropping: Third parties can obtain communication data.
  B. Pretending: Third parties can impersonate another user.
  C. Tampering: Third parties can modify communication data.

• Question 242:

  FILL IN THE BLANK

  As shown in the exhibit, when PE1 receives an ARP request packet, it forwards the packet to PE4. The packet then carries two labels. The label value 201 is carried by the EVPN Type ____ route. (Enter only digits.)

  

  2

• Question 243:

  In a multicast network, which of the following may cause multicast traffic to fail to forward properly? (Choose three)

  A. The router does not have an RPF route
  B. PIM is not enabled on the RPF interface
  C. The upstream router drops the received PIM Join message
  D. In a multi-router egress network, this router is not the DR
  A. The router does not have an RPF route
  B. PIM is not enabled on the RPF interface
  C. The upstream router drops the received PIM Join message

• Question 244:

  In order to configure M4, you first need to define a RADIUS server, which is defined as follows: [Huawei] radius-server template EXAM [Huawei-radius-EXAM] radius-server shared-key cipher HUAwei123 [Huawei-radius-EXAM] radius-server authentication 10766661812 [Huawei-radius-EXAM] radius-server authorization 10766661812 [Huawei-radius-EXAM] radius-server accounting 10766661813 [Huawei-radius-EXAM] radius-server retransmit 2

  A. True
  B. False
  B. False

• Question 245:

  When DLDP detects the presence of a one-way link in the fiber, the default actions of Huawei equipment include the DLDP state machine migrating to the Disable state, output Trap information, and automatically set the interface to a blocked state.

  A. True
  B. False
  A. True

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  Explanation

• Question 246:

  Regarding the BGP/MPLS IP VPN network architecture, what is the error described below?

  A. Sites can access each other through VPNs, and a site can only belong to one VPN.
  B. P devices only need basic MPLS forwarding capabilities and do not maintain VPN-related information.
  C. The BGP/MPLS IP VPN network architecture consists of CE (Customer Edge), PE (Provider Edge), and P (Provider), of which PE and P are carrier devices, and CE is household equipment in the BGP/MPLS IP VPN network.
  D. Under normal circumstances, CE devices are not aware of the presence of VPNs, and CE devices do not need to support MPLS, MP-BGP, etc.
  A. Sites can access each other through VPNs, and a site can only belong to one VPN.

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  Explanation

• Question 247:

  Regarding the FTP protocol, which of the following descriptions is correct?

  A. In FTP passive mode, the client completes the initialization of the TCP sessions for control and data
  B. In FTP active mode, the server tells the client which port it expects to use for sending data by the “PORT” command
  C. FTP always uses a single TCP session to transmit control information and data information
  D. FTP always uses the TCP port to establish a data session and TCP port 21 to establish a control session
  E. FTP always uses TCP port 21 to establish a data session and TCP port 20 to establish a control session
  A. In FTP passive mode, the client completes the initialization of the TCP sessions for control and data

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  Explanation

• Question 248:

  Huawei's SDN controller using VXLAN technology is designed for:

  A. Agile Controller-Campus
  B. Agile Controller-WAN
  C. Agile Controller-DCN
  C. Agile Controller-DCN

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• Question 249:

  Which of the following are carried in the HTTP/1.1 response header? (Choose three)

  A. Status code
  B. Reason phrase
  C. Protocol version
  D. Response method
  A. Status code
  B. Reason phrase
  C. Protocol version

• Question 250:

  Which of the following descriptions of the MPLS header TTL are correct? (Chooes two)

  A. Copying the IP TTL value hides the LSRs in the MPLS domain and provides some security
  B. It can prevent endless circular forwarding of packets
  C. MPLS has two ways of handling TTL: one is that the IP packet copies its TTL into the MPLS header when entering the MPLS network; the other is setting the MPLS header TTL to 255 at the ingress LER
  D. When TTL copying is disabled, tracert can see the LSRs inside the MPLS domain
  B. It can prevent endless circular forwarding of packets
  C. MPLS has two ways of handling TTL: one is that the IP packet copies its TTL into the MPLS header when entering the MPLS network; the other is setting the MPLS header TTL to 255 at the ingress LER