Huawei H12-891 Online Practice Questions and Exam Preparation

Huawei H12-891 Online Questions & Answers

• Question 551:

  VRRP priority is not configured as 0. Devices that send a VRRP priority of 0 stop participating in the VRRP backup group, notifying the backup device to become the master device as soon as possible, without waiting for the Master_Down_Interval timer to time out.

  A. True
  B. False
  A. True

• Question 552:

  If an administrator wants to manage certain routes on the router during operations, which of the following tools can be used to flag these routes so that policies can be configured? (Choose two)

  A. If the BGP protocol is running, the route is marked with the community attribute
  B. Use ACLs to tag routes on the router
  C. Use the tag value to mark the route on the router
  D. Use IP-prefix to tag routes on the router
  A. If the BGP protocol is running, the route is marked with the community attribute
  C. Use the tag value to mark the route on the router

• Question 553:

  Which of the following is the default port used by iMaster NCE-Campus northbound open APIs?

  A. 18008
  B. 18006
  C. 18002
  D. 18000
  B. 18006

• Question 554:

  In the use of the LACP protocol, which of the following descriptions is correct? (Choose two)

  A. You can avoid the Eth-Trunk interface from frequently flapping using the command: interface eth-trunk 1 lacp preempt enable lacp preempt delay delay-time
  B. Source IP address load sharing, interface eth-trunk 1 load-balance src-dst-ip, can be configured in an enabled link aggregation group
  C. A member interface can be removed from an enabled link aggregation group with the following commands: interface GigabitEthernet 0/0/1 shutdown interface GigabitEthernet 0/0/1 undo eth-trunk 1 interface GigabitEthernet 0/0/1 undo shutdown
  D. A member interface can be added to a link aggregation group using the following commands: interface GigabitEthernet 0/0/1 shutdown interface GigabitEthernet 0/0/1 eth-trunk 1 interface GigabitEthernet 0/0/1 undo shutdown
  A. You can avoid the Eth-Trunk interface from frequently flapping using the command: interface eth-trunk 1 lacp preempt enable lacp preempt delay delay-time
  C. A member interface can be removed from an enabled link aggregation group with the following commands: interface GigabitEthernet 0/0/1 shutdown interface GigabitEthernet 0/0/1 undo eth-trunk 1 interface GigabitEthernet 0/0/1 undo shutdown

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• Question 555:

  What is wrong with the following statement about digital certificates?

  A. Digital signatures guarantee the integrity of digital certificates.
  B. Digital certificates contain public key information.
  C. Authentication fails when the peer certificate is within the validity period, but the device itself is set to an incorrect time that falls outside the certificate's validity period.
  D. Even if two PKI entities are not in the same CA system, authentication can be completed as long as both parties can recognize each other's CA.
  D. Even if two PKI entities are not in the same CA system, authentication can be completed as long as both parties can recognize each other's CA.

• Question 556:

  Which of the following descriptions of BGP attributes is correct?

  A. The AS number of the neighboring AS appears on the far right of the AS_PATH list in the BGP route entry.
  B. When a BGP speaker advertises a route learned from an EBGP peer to an IBGP peer, it does not change the next-hop attribute of that routing information.
  C. Local_Pref is valid only within an AS and is not advertised to external ASes.
  D. A route can have only one community attribute value.
  B. When a BGP speaker advertises a route learned from an EBGP peer to an IBGP peer, it does not change the next-hop attribute of that routing information.

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  Explanation

• Question 557:

  When the BFD detection intervals on both ends are 30 ms and 40 ms, are the following options described correctly?

  A. A BFD session can be established, which takes 40 ms after negotiation
  B. BFD sessions can be established, each occurring at its own interval
  C. BFD sessions cannot be established
  A. A BFD session can be established, which takes 40 ms after negotiation

• Question 558:

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

  A. In FTP Passive mode, the client completes the initialization of the TCP session for both control and data.
  B. In FTP Active mode, the server tells the client which port it expects to send data on by using the "PORT" command.
  C. FTP always uses a TCP session to transmit both control information and data information.
  D. FTP always uses TCP port 20 to establish a data session, and TCP port 21 to establish control.
  E. FTP 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 session for both control and data.

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  Explanation

• Question 559:

  In a data communication session between two hosts, the session layer of the OSI model on one end communicates with which layer of the OSI model on the other end?

  A. Communicate with the session layer on the other end
  B. Communicate with the application layer on the other end
  C. Communicate with the data link layer on the other end
  D. Communicate with the presentation layer on the other end
  A. Communicate with the session layer on the other end

• Question 560:

  Which of the following is incorrect about HTTPS?

  A. HTTPS secures access to data by using SSL VPN
  B. If HTTPS traffic contains a virus, the router cannot directly detect the virus using IPS technology
  C. When using HTTPS to access a website, the website cannot be accessed if the user's browser does not recognize the website's digital certificate
  D. The HTTPS protocol uses TCP port 443 by default
  C. When using HTTPS to access a website, the website cannot be accessed if the user's browser does not recognize the website's digital certificate