Huawei H12-821 Online Practice Questions and Exam Preparation

Huawei H12-821 Online Questions & Answers

• Question 201:

  On a network, each router has a local core routing table and protocol routing tables. A routing entry in the local core routing table has multiple key fields. Which of the following are included?

  A. Destination address of a route
  B. Routing protocol preference of a route
  C. Inbound interface that learns a route
  D. Routing protocol that learns a route
  A. Destination address of a route
  B. Routing protocol preference of a route
  D. Routing protocol that learns a route

• Question 202:

  During routine operation and maintenance, an engineer checks the IGMP configuration on RTA. The configuration is as follows:

  Interface information of VPN-Instance: public net GigabitEthernet0/0/1 (192.168.1.1): IGMP is enabled Current IGMP version is 2 IGMP state: up IGMP group policy: none IGMP limit: Value of query interval for IGMP (negotiated): Value of query interval for IGMP (configured): 60 s Value of other querier timeout for IGMP: 0 s Value of maximum query response time for IGMP: 10 s Querier for IGMP: 192.168.1.1 (this router) Given this, which of the following statements is false?

  A. The IP address of the interface is 192.168.1.1.
  B. The maximum response time to Query messages is 10s.
  C. The interval for sending Group-Specific Query messages is 60s.
  D. The IGMP version is IGMPv2.
  C. The interval for sending Group-Specific Query messages is 60s.

• Question 203:

  As shown in the figure, VRRP is associated with a BFD session. When a backup device detects a fault through BFD, the backup device immediately assumes the master role after the Master_Down_Timer timer expires.

  

  A. TRUE
  B. FALSE
  B. FALSE

• Question 204:

  Which three transmission modes are supported for IPv4 packets?

  A. Anycast
  B. Broadcast
  C. Unicast
  D. Multicast
  B. Broadcast
  C. Unicast
  D. Multicast

• Question 205:

  Which of the following statements regarding different LSA types is false?

  A. LS Request packets contain only LS Type, LS ID, and Advertising Router.
  B. LS Ack packets contain complete LSA information.
  C. DD packets contain only LSA summary information, including LS Type, LS ID, Advertising Router, and LS Sequence Number.
  D. LS Update packets contain complete LSA information.
  B. LS Ack packets contain complete LSA information.

• Question 206:

  Which of the following statements regarding the LSA age field are true?

  A. The unit of this field is seconds. In a LSDB, the LS age of a LSA increases with time.
  B. If the LS age of a LSA has reached the LSRefreshTime (30 minutes), any router can regenerate an instance of this LSA again.
  C. The unit of this field is seconds. In a LSDB, the LS age of a LSA decreases with time.
  D. If the LS age of a LSA has reached the LSRefreshTime (30 minutes), the originator of this LSA needs to regenerate an instance of this LSA again.
  A. The unit of this field is seconds. In a LSDB, the LS age of a LSA increases with time.
  D. If the LS age of a LSA has reached the LSRefreshTime (30 minutes), the originator of this LSA needs to regenerate an instance of this LSA again.

• Question 207:

  DRAG DROP

  On an STP network, the root bridge, root port, and designated port are elected in sequence. The election rules of these ports are different. List the steps for electing the root port in sequence.

  Select and Place:

  

  

• Question 208:

  SSH is a secure protocol that establishes tunnels for users on insecure networks. Which of the following statements is false about SSH login?

  A. The SSH server supports authentication. Only users who have passed authentication can log in to the device.
  B. When the SSH server function is enabled on a device, the socket obtaining service is also enabled on the device. This makes the device prone to scanning by attackers. As such, the SSH server function and the corresponding port can be disabled when the SSH server function is not required.
  C. An ACL rule can be configured for each VTY channel to control the IP addresses of clients that are allowed to log in to the device.
  D. By default, the port number of the SSH server is 23. You can change the port number of the SSH server to a non-well-known port number to reduce the probability of being scanned and attacked.
  D. By default, the port number of the SSH server is 23. You can change the port number of the SSH server to a non-well-known port number to reduce the probability of being scanned and attacked.

• Question 209:

  Which of the following statements regarding the stateful inspection firewall is true?

  A. When the stateful inspection firewall checks packets, packets of one same connection are not correlated.
  B. Because UDP is a connectionless protocol, so the stateful inspection firewall cannot match UDP packets with the status table.
  C. The stateful inspection firewall only needs to match the first data packet against a rule, and the subsequent packets of the connection are matched directly in the state table.
  D. The stateful inspection firewall needs to match the rules for each incoming packet.
  C. The stateful inspection firewall only needs to match the first data packet against a rule, and the subsequent packets of the connection are matched directly in the state table.

• Question 210:

  Which of the following statements is true about BGP?

  A. If the export routing policy applied to a BGP peer changes, manual intervention is required so that the device resends Update messages to the peer.
  B. IGP routes can be converted into BGP routes only through the network command.
  C. A router cannot be configured with multiple BGP processes.
  D. Open messages carry only the BGP header.
  A. If the export routing policy applied to a BGP peer changes, manual intervention is required so that the device resends Update messages to the peer.