Try Free Huawei H12-821_V1.0 Updated Questions & Answers

Question 1

During the DHCP interaction process, the DHCP server and client exchange various types of packets. Which of the following packets is not sent from the client to the server?

ADHCP Release

BDHCPNAK

CDHCP Request

DDHCP Discover

Correct answer: B

The DHCPNAK message is sent by the DHCP server to the client to indicate that the requested configuration is not valid. Messages like DHCPDiscover, DHCPRequest, and DHCPRelease are initiated by the client in the DHCP process .

Question 2

A monitoring plane usually comprises the monitoring units of main control boards and interface boards. This plane can monitor the system environment independently. Which of the following environment monitoring functions can be provided by the monitoring plane?

AVoltage monitoring

BTemperature monitoring

CFan control

DSystem power-on and power-off control

Correct answer: A, B, C, D

The monitoring plane's primary role is environmental monitoring, ensuring the stability of the system. Functions like voltage monitoring, temperature tracking, fan speed control, and power management are standard. These are independent of the forwarding or control planes and critical for maintaining device health in network operations .

Question 3

See the command output of a router below. Which of the following statements is true?

display ospf interface GigabitEthernet 0/0/0 verbose

OSPF Process 1 with Router ID 10.0.2.2

Interface: 10.0.12.2 (GigabitEthernet 0/0/0)

Cost: 1 State: BDR Type: Broadcast MTU: 1500

Priority: 1

Designated Router: 10.0.12.1

Backup Designated Router: 10.0.12.2

Timers: Hello 10 , Dead 40 , Poll 120 , Retransmit 5 , Transmit Delay 1

AThe router ID is 10.0.12.2.

BThe interface cost is 1500.

CThis router is a BDR.

DThe interface IP address is 10.1.12.1.

Correct answer: C

The output shows that the router with the IP 10.0.12.2 is the Backup Designated Router (BDR), as indicated in the State: BDR field. The router ID is 10.0.2.2, the interface cost is 1, and the IP address of the interface is 10.0.12.2. Hence, C is the correct answer .

Question 4

Fill in the blanks

There are two BFD operating modes. In_______mode, the local end sends BFD Control packets at specified intervals, and the remote end checks whether the local end periodically sends BFD Control packets. (Use lowercase letters.)

Aasynchronous

Correct answer: A

In asynchronous mode, the local device sends BFD control packets at predefined intervals, and the remote device monitors the receipt of these packets to detect connectivity issues. This is one of the two operating modes in BFD, the other being demand mode .

Question 5

After HSB is configured, the HSB channel fails to be established and cannot back up information on the active device to the standby device. What are the possible causes for this HSB function failure?

AThe TCP channel is not established.

BThe retransmission count and interval for HSB service packets are different on the two devices.

CThe two ACs have the same priority.

DThe source IP address and port number of the local end are different from the destination IP address and port number of the remote end.

Correct answer: A, B, D

High-availability Stateful Backup (HSB) ensures synchronization between active and standby devices. If the HSB channel fails to establish, the following causes are possible:

TCP channel not established: The HSB channel relies on a TCP connection. If the TCP session cannot be established, the backup process cannot start.

Mismatched retransmission settings: If the retransmission count and interval for HSB service packets are inconsistent between the two devices, the synchronization process fails.

Incorrect source and destination configurations: If the source IP address and port number on one device do not match the destination IP address and port number on the other, the channel cannot be established.

Option C is incorrect because the priority of the two ACs affects active/standby roles but does not directly impact HSB channel establishment .

H12-821_V1.0 Exam Dumps and Practice Questions

Actual Huawei H12-821_V1.0 Exam Questions

Unlock all Huawei H12-821_V1.0 questions