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Latest Huawei H12-831 Exam Questions and Answers, 2025 Update | SPOTO

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Question #1
Which of the following actions may affect the normal operation of the customer's network?
A. Device naming
B. software upgrade
C. Hardware expansion
D. Routing Protocol Configuration Changes
View answer
Correct Answer: BCD
Question #2
As its network scale expands, an enterprise plans to move scattered servers to the same equipment room for unified management. During hardware migration, network engineers do not need to perform device commissioning and therefore do not need to work out a migration solution.
A. ATRUE
B. BFALSE
View answer
Correct Answer: B
Question #3
On the network shown in the figure, the DHCP server function is enabled on GE0/0/0 of R2, and the address pool is an interface address pool. When GE0/0/0 and GE0/0/1 of R1 function as DHCP clients, only one interface can obtain an IP address by default. Options:
A. ATRUE
B. BFALSE
View answer
Correct Answer: A
Question #4
As shown in the figure, VLAN aggregation is deployed in a switching network, where Sub-VLAN 10 and Sub-VLAN 20 are added to Super-VLAN 100. If PC1 and PC2, PC1 and PC3 are to be able to communicate with each other, which of the following descriptions about the L3 Switch interface type and the VLAN that should be allowed is correct?
A. GE0/0/1 and GE0/0/2 are both access ports, and the PVID is set to VLAN10
B. GE0/0/1 is a Trunk port, allowing VLAN 10 and VLAN 20 to pass; GE0/0/2 is an Access port, and the PVID is set to VLAN 10correct
C. GE0/0/1 is an access port, and its PVID is set to VLAN 10; GE0/0/2 is a trunk port, and VLAN 10 is allowed
D. Both GE0/0/1 and GE0/0/2 are Trunk ports, and only VLAN 10 is allowed to pass
View answer
Correct Answer: B
Question #5
MPLS determines the upstream and downstream relationship based on the data forwarding direction. The MPLS label message is sent from the upstream LSR and received and processed by the downstream LSR. Similarly, the release of MPLS labels is also distributed one by one from upstream to downstream.
A. True
B. Falsecorrect
View answer
Correct Answer: B
Question #6
According to this picture, we can judge:
A. The device type of R3 must be Level-1-2correct
B. Unable to determine the device type of R3
C. The device type of R3 must be Level-1
D. The device type of R3 must be Level-2
View answer
Correct Answer: A
Question #7
In a BGP/MPLS IP VPN network, VPNv4 routing transfers carry Export RT values. Which of the following path attributes does MP-BGP use to carry Export RT?
A. Extended Communitycorrect
B. AS Path
C. Local Preference
D. MP_REACH_NLRI
View answer
Correct Answer: A
Question #8
Which of the following is not a hardware preparation for cutover?
A. Test the operation of the board
B. Power-on test
C. Device version checkcorrect
D. Cable Continuity Test
View answer
Correct Answer: C
Question #9
The Discovery message of LDP is used for neighbor discovery, and LDP has different discovery mechanisms when discovering neighbors. The following statement about the Discovery message in the basic discovery mechanism is correct
A. TCPAfter the connection is establisheD
B. Purpose of the messageIPaddress is multicastIPaddress224
C. This message is encapsulated inUDPIn the message, the destination port number is646
D. The message is sent to the specifiedLDP Peer
View answer
Correct Answer: BC
Question #10
If a network engineer forgets the console port password when troubleshooting, Huawei Net Engine AR series routers support configuration in the Boot ROM to skip the console port password startup.
A. Truecorrect
B. False
View answer
Correct Answer: A
Question #11
As shown in the figure, the network administrator deploys the DHCP Snooping function on the switch to defend against attacks by DHCP Server impersonators. Which of the following interfaces should be set as a DHCP trusted interface?
A. GE0/0/2correct
B. GE0/0/3
C. GE0/0/1
D. GE0/0/4
View answer
Correct Answer: A
Question #12
An enterprise purchased private lines from two operators. In order to optimize the lines, the enterprise used BGP to learn routing entries from the two operators. However, the enterprise found that the traffic of the egress route increased greatly after this configuration. After the network engineering investigation, it was found that the traffic of the two operators was passed to each other through the enterprise egress router. Therefore, the enterprise intends to use the routing strategy so that the traff
A. TRUEcorrect
B. FALSE
View answer
Correct Answer: A
Question #13
In the BGP/MPLS IP VPN network shown in the figure, which of the following RT value plans can enable Site 1 and Site 2 to communicate with Site 3? (Multiple choice)
A. PE1: IRT=100:1; ERT=100:1PE2: IRT=100:1; ERT=100:1PE3: IRT=100:1; ERT=100:1correct
B. PE1: IRT=100:1; ERT=100:1PE2: IRT=200:1; ERT=200:1PE3: IRT=100:1, 200:1; ERT=100:1, 200:1correct
C. PE1: IRT=100:1; ERT=200:1PE2: IRT=200:1; ERT=100:1PE3: IRT=100:1; ERT=200:1
D. PE1: IRT=100:1; ERT=200:1PE2: IRT=100:1; ERT=200:1PE3: IRT=200:1; ERT=100:1correct
View answer
Correct Answer: ABD
Question #14
In the OSPF network shown in the figure, the area numbers are marked in the figure, where area 1 is the Stub area, area 2 is the Totally Stub area, and area 3 is the NSSA area. By default, which of the following routers does not have a default route in its routing table?
A. R3correct
B. R5
C. R4
D. R6
View answer
Correct Answer: A
Question #15
The Link-LSA generated by an OSPFv3 router is shown in the figure. Which of the following is the number of global unicast addresses configured on the interface?
A. 4
B. 3correct
C. 1
D. 2
View answer
Correct Answer: B
Question #16
Use "display ospfv3 peer verbose" to view OSPFv3 neighbor information. In the output information, you can see the peer's Router ID, the global unicast address of the peer's interface, the neighbor's status, and other content.
A. True
B. Falsecorrect
View answer
Correct Answer: B
Question #17
As shown below: IR2] ad 2000 [R2-ad-basic-2000]rule deny [R2-ad-basic-2000]quit # [R2] ospf [R2-ospf1]area 1 [R2-ospM-area-0.0.0.1] filter 2000 import [R2-ospf-1-area-0.0.0,1] quit [R2-ospf-1] default-route-advertise always
A. Area2containsType5LSAflood
B. Area2no insideType3 LSAflood
C. ArealcontainsType5 LSAflood
D. Arealno insideType3 LSAflood
View answer
Correct Answer: D
Question #18
The exchange of Hello messages between two LSRs (Label switching Routers) triggers the establishment of an LDP session. The Hello message carries the transport address. The device with the smaller transport address will act as the active party and initiate the establishment of a TCP connection.
A. True
B. Falsecorrect
View answer
Correct Answer: B
Question #19
When troubleshooting the EBGP neighbor relationship, you find that the two directly connected devices use the loopback port to establish a connection, so execute display current-configuration configuration bgp to check the configuration of peer ebgp-max-hophop-count. Which of the following statements is correct?
A. hop-count/ must be greater than 2
B. hop-count must be greater than 15
C. hop-county must be greater than 1correct
D. hop-count must be greater than 255
View answer
Correct Answer: C
Question #20
In the OSPFv3 network shown in the figure, area 1 is the Totally Stub area, area 2 is the normal area, and area 3 is the Totally NSSA area. The IPv6 address of the R6 Lopback0 interface is 2000::6/128. The Router ID of each device is 10.0.X.X, where X is the device number. When all links are normal, which of the following descriptions are correct by default? (Multiple choice)
A. The path for R4 to send a data packet to 2000::6 may be R4-R1-R3-R6correct
B. The path that R4 sends the data packet to reach 2000::6 may be R4-R2-R6correct
C. The path for R4 to send a data packet to 2000::6 may be R4-R1-R5-R3-R6
D. The path for R4 to send a data packet to 2000::6 may be R4-R1-R2-R6correct
View answer
Correct Answer: ABD
Question #21
If a network engineer forgets the console port password when troubleshooting, Huawei Net Engine AR series routers support configuration in the Boot ROM to skip the console port password startup.
A. Truecorrect
B. False
View answer
Correct Answer: A
Question #22
As shown in the figure, an enterprise hopes to achieve secure mutual visits between the headquarters and branches, as well as business isolation between the R&D area and the non-R&D area without changing the network deployment. To meet this requirement, the administrator deploys BGP/MPLS IP VPN in the network. Which of the following descriptions of this scenario are correct? (Multiple choice)
A. To achieve mutual access between the headquarters and the branch R&D area, you can set the ERI and IRT of VPN1 and VEN2 to 100:100
B. Since the address space of the R&D area and the non-R&D area overlap, it is impossible to isolate the business of the two areas
C. To isolate the R&D area and non-R&D area of the headquarters, you can set the RT value of VPN1 to 100:100 and the RT value of VPN3 to 200:200
D. To achieve mutual access between the headquarters and the branch R&D area, the RD values of VPN1 and VFN2 need to be set to the same value
View answer
Correct Answer: AC
Question #23
As shown below:
A. The IS-Leve1 of R3 and R1 do not match
B. The area numbers of R3 and R1 are different
C. The IIH authentication of R3 and R1 failed
D. The System IDs of R3 and R1 are duplicatedcorrect
View answer
Correct Answer: D
Question #24
The MPLS architecture consists of the control plane and forwarding plane, each of which contains multiple protocols and entries. Which of the following tables is used to forward MPLS labeled packets? Options:
A. FIB
B. RIB
C. LIB
D. LFIB
View answer
Correct Answer: D
Question #25
When deploying MPLS/BGP IP VPN, which of the following descriptions is wrong about using BGP to exchange routing information between PEs and CEs?
A. existCEIn the case of multi-homing, enableBGP ASThe number substitution function may cause routing loops that can be passed throughBGP SoDpreventVPNIntra-site routing loops
B. whenPEandCEbetweenBGPWhen exchanging routing information, if twoVPNThe autonomous system the site is in uses the same privateASnumber, can be passed throughASThe number replacement function is to use any specifiedASreplace the received private network route with theASnumber to preventASRoutes are discarded due to duplicate numbers C
D. whenPEandCEbetweenBGPWhen exchanging routing information, you do not need toPEPerform private network route import on theBGPoperation
View answer
Correct Answer: B
Question #26
When the device logs in to other devices as an SSH client and fails to log in using public key authentication, which of the following are possible reasons? (Multiple choice)
A. The user public key stored on the server is wrongcorrect
B. The client does not enable the first authentication functioncorrect
C. Missing local key paircorrect
D. The server private key saved on the client is wrong
View answer
Correct Answer: ABC
Question #27
In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.XX, and the AS number is 6500x, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import. R1 adds the Community attribute value (1:1) when sending routes to its neighbors, and all routers in the network are enabled to transmit community attributes.
A. R3-R2-R4
B. R3-R2-R1
C. R3 has no route to 192
D. R3-R5-R1
View answer
Correct Answer: C
Question #28
According to this picture, we can judge:
A. 4 does not have any IS-IS neighbors
B. 4 and ee8c
C. 4 and ee8c
D. 4 and ee8c
View answer
Correct Answer: B
Question #29
A network engineer wants to clear the serial port login password. Which of the following should he enter?
A. 5
B. 3
C. 6correct
D. 4
View answer
Correct Answer: C
Question #30
An engineer used two routers to test IPv6 services, and simulated the interconnection between headquarters and branches by running BGP4+. The logical topology of the network is shown in the figure. Regarding the transmission of IPv6 routes between two devices, which of the following statements is wrong?
A. hen routing, the Next_Hop attribute must be an IPv6 global unicast address
B. GP4+ transmits routing information between peers through Update messages
C. f the Update message carries the MP_REACH_NLRI attribute, it means that the advertised route is reachable
D. hen routing, it will carry AS_Path and other recognized mandatory attributes
View answer
Correct Answer: A

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