H12-831_V1.0-ENU Self-Study Guide for Becoming an HCIP-Datacom-Advanced Routing & Switching Technology V1.0 Expert

H12-831_V1.0-ENU Study Guide Realistic Verified H12-831_V1.0-ENU Dumps

Huawei H12-831_V1.0 (HCIP-Datacom-Advanced Routing & Switching Technology V1.0) certification exam is a highly sought-after certification for professionals in the field of networking. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is designed to validate the skills and knowledge required to plan, design, and implement advanced routing and switching solutions using Huawei devices.

 

NEW QUESTION # 68
Through the display ip interface GE0/D/D command, you can view the statistics of ping packets received on this interface.

• A. TRUE
• B. FALSE

Answer: A

NEW QUESTION # 69
As shown in the figure, an engineer uses 4 routers to test branch network interoperability. Among them, R1, R2, and R3 in branch 1 deploy OSPF to achieve network interoperability. R2, R3, and R4 in branch 2 deploy IS-S to achieve network interoperability.

Now the engineer wants to realize the loopback address of R1 to R4. Which of the following operations can meet this requirement?

• A. In the OSFF process and the IS-IS process of R2, respectively advertise the default route
• B. Advertise the default route only in the IS-IS process of R2
• C. No configuration is required
• D. Advertise the default route only in the OSPF process of R2

Answer: A

NEW QUESTION # 70
In the hub-spoke networking shown in the figure, the Hub-PE can be configured to allow repetitive local AS numbers for correct route transmission.

Is this statement TRUE or FALSE?
Options:

• A. TRUE
• B. FALSE

Answer: A

Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding the Hub-Spoke BGP Design
* Hub-Spoke topology is commonly used in MPLS Layer 3 VPNs, where:
* Hub-PE acts as a central router.
* Spoke-PEs connect to the hub but do not communicate directly with each other.
* eBGP (External BGP) is used between the Hub-PE and Spoke-PE routers.
2. The Role of AS Numbers in BGP Route Transmission
* By default, BGP prevents routes from being sent back to the same AS (Autonomous System) to avoid loops (via the AS_PATH loop prevention mechanism).
* However, in a Hub-Spoke MPLS VPN, the Hub-PE must be allowed to re-advertise routes learned from one spoke to another spoke.
* This requires allowing repetitive AS numbers within the same AS to avoid BGP rejecting valid routes.
3. Solution: Using "Allow-AS Loop" on the Hub-PE
* The allowas-in or allow-as-loop command must be used on Hub-PE to allow repetitive local AS numbers.
* This ensures that routes from Spoke-PE1 (AS65002) are advertised to Spoke-PE2 (AS65003) via Hub-PE, even if AS numbers are repeated.
Example Configuration on Hub-PE:
plaintext
CopyEdit
bgp 65001
peer Spoke-PE1 allow-as-loop 2
peer Spoke-PE2 allow-as-loop 2
* This allows Hub-PE to accept and propagate routes even if the AS number appears more than once.
4. Evaluating the Answer Choices
Option
Correct?
Reasoning
A: TRUE
# Correct
Hub-PE can be configured to allow repetitive AS numbers using the allow-as-loop feature.
B: FALSE
# Incorrect
BGP by default prevents repeated AS numbers, but this can be overridden.
# Correct answer: A. TRUE
Final Conclusion:
* By default, BGP prevents AS loopbacks.
* Hub-PE needs to allow repetitive AS numbers for proper route transmission in the hub-spoke model.
* The "allow-as-loop" command enables this functionality.
* Thus, the correct answer is: TRUE.

NEW QUESTION # 71
Which of the following descriptions about MPLS header TTL are correct? (Multiple choice)

• A. The processing method of copying the IP TTL value hides the LSR of the MPLS domain and plays a certain security role
• B. There are two ways to correct MPLST and TTL. One is to copy the TTL value of the MPLS header when an IP packet enters the MPLS network. The other is to set the TTL of the MPLS header to 255 at the ingress LER.
• C. Can prevent infinite loop forwarding of messages
• D. In the case of banning Bay TTL, tracert can see the LSR of the MPLS domain that it passes through

Answer: B,C

NEW QUESTION # 72
by executing___________The command can completely isolate the second and third layer users of different ports on the same LAN and cannot communicate. (Please use English and lowercase letters to complete the command, and the command cannot be abbreviated)

Answer:

Explanation:
portisolateenable

NEW QUESTION # 73
The deployment of port isolation technology in Ethernet can realize Layer 2 intercommunication and Layer 3 isolation, making the network more flexible.

• A. TRUE
• B. FALSE

Answer: B

NEW QUESTION # 74
Service routes of an enterprise are transmitted on the network. Some configurations of PE1 and PE2 are shown in the figure. Which of the following LSAs may CE2 receive?

• A. Type 5 LSA
• B. Type 3 LSA
• C. Type 1 LSA
• D. Type 7 LSA

Answer: B,C

NEW QUESTION # 75
On the ISIS network shown in the figure, R1 imports a default route using the default-route-advertise always level-1 command. In this case, R3 can learn this default route through IS-IS.

• A. TRUE
• B. FALSE

Answer: B

NEW QUESTION # 76
In BGPIMPLS IP VPN, if the OSPF protocol is used between PEs and CEs to exchange routing information, the domain identifier (Domain ID) is used to distinguish whether the incoming routes in the VPI instance come from the same OSPF domain.

• A. False
• B. True

Answer: B

NEW QUESTION # 77
A campus has deployed IPv6 for service testing. There are 4 routers (R1, 22, R3 and R4) in this network, running 0SPFV3 to realize the interconnection of IPv6 network. A new router R5 needs to be connected to the network for testing. An engineer introduces a direct route in the OSPFVV3 process of R4 so that devices in the campus network can access the GE0/0/1 port address of R5. Which of the following statements about the scene is true of?

• A. R4will generate aType5 LSAdescribe bowIenteredIPv6routing prefix
• B. R4will generate aType5 LSAonly inArea 1internal flooding
• C. R2will generate aType4 LSAdescribeR4ofRouter ID
• D. R2will generate aType4 LSAonly inArea 0internal flooding

Answer: A,C,D

NEW QUESTION # 78
Which of the following is not a hardware preparation for cutover?

• A. Cable Continuity Test
• B. Device version check
• C. Test the operation of the board
• D. Power-on test

Answer: B

NEW QUESTION # 79
As shown in the figure, Client1 and Client2 act as clients of RR1 and RR2 at the same time, and RR1 and RR2 are in the same In a Cluster, R introduces 10 routes. It is assumed that the configuration of B, CP is correct. Neighbor relations have been established Now, how many routing entries exist in the BGP routing table of Client2?

• A. 0
• B. 1
• C. 2
• D. 3

Answer: C

NEW QUESTION # 80
As shown in the figure, PE1 and PE2 and their respective CEs exchange private network routing information through OSPF, and the same DomainID is configured on PE1 and PE2. When routes are imported from BGP to OSPF on PE2, which of the following types of SA may be delivered to CE2? (Multiple choice)

• A. Type5 LSA
• B. Type3 LSA
• C. Type1 LSA
• D. Type7 LSA

Answer: A,B,D

NEW QUESTION # 81
MPLS-straight is slower than IP forwarding.

• A. True
• B. False

Answer: B

NEW QUESTION # 82
Which of the following statements about MUX VLANs are true?

• A. eachGroup VLANmust bind aPrincipal VLAN
• B. Principal VLANcan andMUX VLAIall withinVLANcommunication
• C. eachSeparate VLANsmust bind aPrincipal VLAN
• D. Separate VLANscan andMUX VLANall withinVLANcommunication

Answer: A,B,C

NEW QUESTION # 83
Regarding sham link, which of the following description is wrong?

• A. The endpoint address of the sham link is advertised as a VPhv4 address by BGP. Routes that have passed sam1ik can also be imported into BGP in the form of VPNv4 routes
• B. In order to forward the VPN flow through the MPLS backbone network, the routing cost of the sham link should be less than the OSPF routing cost of the backdoor road
• C. The sham link is a link between two VPN instances. Each VPN instance must have an endpoint address of the sham link, which must be a Loopback with a 32-bit mask in the VPN address space on the PE router. interface address
• D. The sham link can be configured in any area and needs to be configured manually, and there must be a route to the sham link destination address (the sham link endpoint address of the peer PE) in the local VPN instance

Answer: A

NEW QUESTION # 84
CutoverThe previous information collection can be used to determine whether the services before and after the cutover are normal.

• A. wrong
• B. right

Answer: B

NEW QUESTION # 85
As shown in the figure, R1, R2, R3, and R4 are in the same PLs domain, and LDP is used to distribute IPLS labels between devices.
R4 is the Egress LSR of the FEC 4.4.4.0/24. If you want to achieve R1 access 4.4.4.0/24, R4 does not need to query the label table but can know the forwarding priority of the data, then the outgoing label of R3 for the FEC should be:____. (Please fill in the Arabic numerals directly, without symbols)

Answer:

Explanation:
(0)

NEW QUESTION # 86
On the 05PFv3 network shown in the figure, each interface of R1 and R2 has two IPv6 addresses. Although the IPv6 address prefixes of R1 and R2 are different, they can still be used to establish an OSPFv3 neighbor relationship. If R2 is the DR, the Intra-Area-Prefix-LSA generated by R2 contains four prefixes.

• A. TRUE
• B. FALSE

Answer: A

NEW QUESTION # 87
A campus has deployed IPv6 for service testing. There are 4 routers in the network, running 0SPFV3.
Interconnection of IPv6 networks. As shown in the figure, an engineer checked the LSDB of R2 and intercepted one of them Link-LSAs. Which of the following statements is true about the description of this LSA?

• A. produce theLSAThe router isR2
• B. ShouldLSAshowR2External routing is not supported, but participatingIPv6route calculation
• C. R2interfaceGE0/0/0IPV6address prefix:2001:2343:23: :/64
• D. R2interfaceGEO/O/OThe link-local address force:FE80::2E0;FCFF:FEC, D:4F79

Answer: A,C,D

NEW QUESTION # 88
Which of the following is included in the routine collection of basic equipment information?

• A. License information
• B. The software version the device is running
• C. Whether the configuration is saved
• D. Patch information

Answer: A,B,C,D

NEW QUESTION # 89
As shown in the figure, which of the following statement is correct? (Multiple choice)

• A. There are 8 routers in area 0
• B. There are 4 MA networks in area 0
• C. There are 4 routers in area 0
• D. There are 8 MA networks in area 0

Answer: B,C

NEW QUESTION # 90
(Drag and drop question) The configuration shown in the figure is performed on R2 to filter all incoming routes. Suppose there is an entry on R1 AS_Path attribute is [100 200 300 400] BGP routes need to be sent to R2, please help network administrators in Adjust the AS order in the AS_Path attribute of the route on R1 to ensure that the route entry will not be routed by R2 route^policy AS-PATH permit node 10 if-match as-path-filter BGP route-policy AS-PATH deny node 20 ip as-path-filter BGP permit A[A2]00 400 100_

route-policy AS-PATH permit node 10 if-match ip-prefix BGP
apply as-path overwrite
ip ip-prefix BGP permit 10.0.0.0 24

• A. 300-C 400-A 100-B 200-D
• B. 300-A 400-C 100-B 200-D
• C. 300-A 400-B100-C 200-D
• D. 300-B 400-A 100-C 200-D

Answer: C

NEW QUESTION # 91
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