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Latest Huawei H12-821 Exam Questions and Answers, 2025 Update | SPOTO

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Question #1
When using authentication in BGP configuration, how should it be configured?
A. A pair of BGP peers must use the same MD5 passwordcorrect
B. All routers in the AS must use the same password
C. All BGP peers on a router must use the same password
D. All routers in the same AS must use the same password
View answer
Correct Answer: A
Question #2
The following is part of the output information of the router Huawei. Regarding the output information, the wrong description is:
A. The router gigabitethernet 1/0/0 interface runs PIM-SM
B. The PIM status of the router gigabitethernet 1/0/0 interface is UP
C. The router gigabitethernet 1/0/0 interface runs PIMv2
D. The DR on this interface is 10
View answer
Correct Answer: D
Question #3
When performing source NAT configuration and having no-pat configuration parameters, which of the following statements is correct?
A. Only the destination IP address is translated
B. Simultaneous source IP address and source port translation
C. Only source IP address translation is performedcorrect
D. Perform destination IP address and destination port translation
View answer
Correct Answer: C
Question #4
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?
A. Voltage monitoring
B. Temperature monitoring
C. Fan control
D. System power - on and power - off control
View answer
Correct Answer: B
Question #5
When the IPv6 address of the host is configured in the stateless address configuration method, and other parameters except the address are obtained through DHCPv6, how to set the M bit and 0 bit in the RA message?
A. M=0 0=0
B. M=1 0=0
C. M=1 0=1
D. M=0 0=1correct
View answer
Correct Answer: D
Question #6
Regarding the description of IGMP Snooping-working mechanism, which is the correct?
A. The layer 2 switch establishes and maintains the PIM routing table on the layer 2 by continuously monitoring IGMP messages
B. When IGMP Snooping is not running, the multicast message will be broadcast on the second layer
C. If the host sends an IGMP leave message, the switch will add the host to the corresponding multicast table
D. If the host sends an IGMP host report message, the switch will delete the multicast entry corresponding to the hos
View answer
Correct Answer: B
Question #7
Which of the following tools cannot be directly referenced by the apply clause of a route-policy?
A. IP-Prefixcorrect
B. tag
C. community
D. origin
View answer
Correct Answer: A
Question #8
When using authentication in BGP configuration, how should it be configured?
A. A pair of BGP peers must use the same MD5 passwordcorrect
B. All routers in the AS must use the same password
C. All BGP peers on a router must use the same password
D. All routers in the same AS must use the same password
View answer
Correct Answer: A
Question #9
The RSTP protocol provides a variety of protection functions. For example, when the edge terminal port is configured in the protection state, the processing method of the edge port after receiving the BPDU message is:
A. Forward BPDU messages as required
B. Obtain relevant information after the BPDU message
C. Close the portcorrect
D. Directly discard the BPDUmessage
View answer
Correct Answer: C
Question #10
As shown in the figure, the four routers in the same LAN run IS-IS, and R1 is DIS. Then R2, R3 R4 respectively establish adjacency relationship with R1, and R2, R3, R4 do not establish adjacency relationship.
A. True
B. Falsecorrect
View answer
Correct Answer: B
Question #11
Which of the following description about the prefix list is wrong?
A. The prefix list can match the prefix number and prefix length
B. The prefix list can be used for packet filteringcorrect
C. The prefix list can be used to filter IP prefixes
D. The prefix list has a stronger matching function for routing masks than the access control list
View answer
Correct Answer: B
Question #12
The IP protocol number of the VRRP message is:
A. 116
B. 114
C. 112correct
D. 118
View answer
Correct Answer: C
Question #13
Which of the following methods is usually used by a network administrator to configure a newly purchased device for the first time?
A. ATelnet
B. BSNMP
C. CLogin through the Console port
D. DFTP
View answer
Correct Answer: C
Question #14
Regarding the ABR in OSPF, which is the wrong description?
A. ABR cannot generate Type 3, Type 4, and Type 5 LSAscorrect
B. Convert the Type 1 and Type 2 LSAs in the connected non-bone thousand areas into Type 3 LSAs and publish them to the backbone area
C. The Type 1, Type 2, and Type 3 LSAs in the backbone area of the ABR grid are converted into Type 3 LSAs and advertised to the connected non-bone thousand areas
D. There are multiple LSDBs on the ABR, and the ABR maintains an LSDB for each area
View answer
Correct Answer: A
Question #15
On an RSTP network, if a port receives an RST BPDU and finds that its buffered RST BPDU is superior to the received RST BPDU, the port discards the received RST BPDU without responding.
A. ATRUE
B. BFALSE
View answer
Correct Answer: A
Question #16
When OSPF runs in a broadcast network, it is necessary to elect DR and BDR. So, in which of the following states, the election of DR and BDR will be carried out?
A. 2-way statuscorrect
B. Exchange status
C. Full status
D. Init state
View answer
Correct Answer: A
Question #17
The following is part of the output information of the router RTB. The wrong description of the output information is:
A. The host to send the last Report message is 225
B. The number of dynamically joined multicast groups on the interface is 1
C. The display igmp group command is used to view IGMP multicast information, including the information of the multicast group dynamically joined through the member report and the multicast group statically joined through the command line
D. The joined multicast address is 255
View answer
Correct Answer: A
Question #18
Which of the following descriptions about the Keepalive message in BGP is wrong?
A. Keepalive messages are mainly used to maintain the connection between BGP peers
B. The Keepalive message contains only one BGP data header
C. By default, the Keepalive interval is 180 secondscorrect
D. Keepalive messages are periodically sent between two BGP neighbors
View answer
Correct Answer: C
Question #19
Which of the following configurations are not mandatory when an administrator configures VRRP?
A. Preemption mode
B. Preemption delay
C. Virtual router priority
D. Virtual IP address
View answer
Correct Answer: AB
Question #20
Which of the following statements regarding BGP peer are false? (Choose all that apply.)
A. GP peers exchange link state information
B. UDP connection must be established before BGP relationships are established
C. GP routers support automatic neighbor discovery
D. GP peers must be configured with MD5 authentication
View answer
Correct Answer: ABC
Question #21
The MAC address of a certain PC is 5489-98FB-65D8. The administrator wants this PC to obtain the specified IP address 192.168.1.11/24 from the DHCP server, so the command configured by the administrator should be:
A. dhcp static-bind ip-address 192
B. dhcp server static-bind ip-address 192
C. dhcp server static-bind ip-address 192
D. dhcp static-bind ip-address 192
View answer
Correct Answer: B
Question #22
When the IPv6 address of the host is configured in the stateless address configuration method, and other parameters except the address are obtained through DHCPv6, how to set the M bit and 0 bit in the RA message?
A. M=0 0=0
B. M=1 0=0
C. M=1 0=1
D. M=0 0=1correct
View answer
Correct Answer: D
Question #23
Which of the following statements regarding the BGP error display of a router false?
A. The error may be caused by the incorrect neighbor address
B. The neighbor address of this router is 10
C. Error Type indicates that the BGP error is caused by the neighbor relationship error
D. The error occurred at 12:40:39 on March 22, 2010
View answer
Correct Answer: C
Question #24
The MAC address of a certain PC is 5489-98FB-65D8. The administrator wants this PC to obtain the specified IP address 192.168.1.11/24 from the DHCP server, so the command configured by the administrator should be?
A. dhcp static-bind ip-address 192
B. dhcp server static-bind ip-address 192
C. dhcp server static-bind ip-address 192
D. dhcp static-bind ip-address 192
View answer
Correct Answer: B
Question #25
One VRRP virtual router can only have the virtual IP address.
A. RUE
B. ALSE
View answer
Correct Answer: B
Question #26
Which of the following statements regarding OSPF packets is false?
A. DD packets contain all LSA information and can be used to periodically synchronize LSOB information between neighbors
B. Hello packets are used to discover and maintain OSPF neighbor relationships and also can be used to elect DR and BDR on broadcast and NBMA networks
C. Two routers must send Hello packets at the same interval
D. DD packets carry LSA header information to describe link state summary information
View answer
Correct Answer: A
Question #27
Regarding LSA3, LSA4 and LSA5, which of the following description is correct?
A. LSA5 will not change after passing through different areas, but LSA3 will changecorrect
B. LSA3, LSA4 and LSA5 will not change after passing through different areas
C. LSA3 will not change after passing through different areas, but LSA4 and LSA5 will change
D. LSA4 will not change after passing through different areas, but LSA3 and LSA5 will change
View answer
Correct Answer: A
Question #28
Which of the following statements regarding the firewall zone security level is false?
A. The configured security level cannot be changed
B. Two zones cannot be configured with the same security level
C. The default security level of the new zone is 1
D. Only the security level of the user-defined zone can be configured
View answer
Correct Answer: A
Question #29
The filter-policy 2000 export is configured in the IS-IS process, which statement about the function of this command is wrong?
A. It needs to be used in combination with route import, so that only part of the imported external routes can be advertised to neighbors
B. This command will filter the link state information published externally
C. If this command is not configured, the device will advertise all the routes imported to S-IS by the external routing protocol by default
D. It will restrict the publishing of routing entries generated by the device itselfcorrect
View answer
Correct Answer: D
Question #30
About the description about the OSPF calculating the shortest path tree stage, which is the correct?
A. The first stage calculates the Stub network segment, and the second stage calculates the router node and Transit network segment
B. The first stage calculates routing nodes and Transit network segments, and the second stage calculates Stub network segments
C. The first stage calculates the stub segment, and the second stage calculates the routing node
D. The first stage calculates the routing nodes, and the second stage calculates the Stub network segment
View answer
Correct Answer: B

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