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Huawei H12-831_V1.0-ENU exam covers a range of topics, including advanced routing protocols, IP QoS, MPLS VPN, and network security. Candidates will be tested on their ability to configure and troubleshoot these technologies using Huawei devices. H12-831_V1.0 exam consists of multiple-choice questions, and candidates have three hours to complete it. Successful candidates will receive the HCIP-Datacom-Advanced Routing & Switching Technology certification, which is recognized as a valuable credential in the IT industry.
Huawei H12-831_V1.0-ENU exam is a certification exam that validates the skills and knowledge of professionals who work in the field of advanced routing and switching technology. H12-831_V1.0 Exam is designed to test the candidates' ability to configure and troubleshoot complex networks, as well as their understanding of advanced routing and switching concepts.
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Huawei is a well-known brand in the technology industry, offering a wide range of products and solutions for communication networks, cloud computing, and more. One of Huawei's key offerings is the HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification, also known as the H12-831_V1.0 Certification. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification is designed to validate the skills and knowledge of individuals in the field of advanced routing and switching technologies.
NEW QUESTION # 236
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.
Answer: B
NEW QUESTION # 237
Please match 0SPFv3LSA with its transmission range.
Answer: A
Explanation:
AS-external-LSA Autonomous system-wide intra-regional propagation
Network-1SA intra-regional spread
NEW QUESTION # 238
MP-BGP uses the new path attribute to advertise VPNv4 routes or withdraw unreachable routes on a BGP
/MPLS IP VPN network.
Answer: B
Explanation:
MP-BGP (Multiprotocol BGP) is an extension of BGP that supports multiple address families, including VPNv4 routes.
* MP-BGP introduces a new BGP path attribute called MP_REACH_NLRI (for route advertisement) and MP_UNREACH_NLRI (for route withdrawal).
* These attributes are used for:
* Advertising VPNv4 and VPNv6 routes
* Withdrawing unreachable VPNv4/VPNv6 routes
* Supporting other AFI/SAFI combinations beyond IPv4 unicast
# Official Reference from Huawei:
" MP-BGP introduces MP_REACH_NLRI and MP_UNREACH_NLRI attributes to advertise or withdraw VPNv4/VPNv6 routes. "
- [Huawei HCIA-Datacom Certification Guide - BGP/MPLS VPN Section]
NEW QUESTION # 239
On an enterprise network shown in the figure, if CE2 is dual-homed to PE2 and PE3, a routing loop may occur during the exchange of Type 5 LSAs (External LSAs in OSPF).
To prevent the loop, the route-tag command can be run on PE2 and PE3.
In this way, if the route tag of the route received by PE3 is the same as that configured locally, the route is ignored.
Is this statement True or False?
Answer: B
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding the Issue of OSPF Type 5 LSAs in a Dual-Homed CE Scenario
* OSPF Type 5 LSAs (External LSAs) are used in OSPF to advertise external routes, such as those learned via BGP or redistributed from another protocol.
* In a dual-homed CE setup, like the one in the figure, CE2 connects to both PE2 and PE3 using OSPF.
* PE2 and PE3 both redistribute BGP routes into OSPF and advertise them to CE2.
* CE2 then forwards these LSAs between PE2 and PE3, potentially causing a routing loop because each PE may re-learn its own previously advertised routes.
2. How Route Tags Prevent Loops in OSPF-BGP Redistribution
* The route-tag command assigns a tag to redistributed routes.
* When a router receives an external OSPF LSA (Type 5), it checks the route tag.
* If the route tag matches the locally configured tag, the router ignores the route to prevent loops.
Example Configuration on PE Routers:
plaintext
CopyEdit
PE2:
router ospf 1
import-route bgp 100 route-tag 65001
PE3:
router ospf 1
import-route bgp 100 route-tag 65001
* Both PE2 and PE3 tag their redistributed BGP routes with 65001.
* If PE3 receives an LSA from CE2 with the tag 65001, it ignores it (because it knows it originally advertised it).
# This prevents OSPF from incorrectly preferring a route that was originally sourced from itself, avoiding routing loops.
3. Evaluating the Answer Choices
# TRUE: If the route tag of the received route matches the locally configured tag, the route is ignored, preventing loops.# FALSE: The statement is correct, so False is incorrect.
Thus, the correct answer is: A. TRUE
Final Conclusion:
# The statement is TRUE because route tagging is a valid method to prevent OSPF Type 5 LSA loops in dual-homed scenarios.
NEW QUESTION # 240
On the network shown in the figure, EBGP peer relationships are established between neighboring routers through directly connected interfaces. The router ID of each router is 10.0.X.X, and the AS number is 6500X, where X is the number of the router.
Both R1 and R4 have static routes to 192.168.1.0/24, which are imported to BGP using the import-route command.
R1 adds a community attribute (1:1) to the route when sending it to peers.
All routers are enabled to transmit the community attribute.
Routing policies are configured on R2 and R3 to reject routes with community 1:1.
In this case, which of the following is the path for traffic from R3 to 192.168.1.0/24?
Answer: A
Explanation:
# Key Observations:
* R1 and R4 both import the static route 192.168.1.0/24 into BGP.
* R1 tags the route with community 1:1, and all routers transmit community attributes.
* R2 and R3 have policies to reject routes containing 1:1.
* R4 does NOT tag the route with 1:1, so its advertisement is accepted.
# Behavior Breakdown:
* # R1 sends the route with community 1:1 to R2 # R2 rejects it.
* # R2 does not propagate R1 ' s route to R3 (rejected by policy).
* # R4 sends the route without 1:1 to R2.
* # R2 accepts R4 ' s route and forwards it to R3.
* # R3 receives a clean route via R2 # R4 and installs it.
# Path followed:
R3 # R2 # R4 # 192.168.1.0/24
# Final Answer: B. R3 # R2 # R4
Official Huawei Extract:
" BGP community attributes can be used to mark routes and influence routing decisions through routing policies. If a router is configured to deny routes with a specific community, it will not install or forward such routes. Routes received without the blocked community tag will be accepted and used. "
- [Huawei HCIA-Datacom Certification Guide - BGP Community Attribute and Routing Policy Section]
NEW QUESTION # 241
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