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Huawei H12-831_V1.0 certification exam is a computer-based exam that consists of 60 multiple-choice questions. H12-831_V1.0-ENU Exam is administered by Pearson VUE, a leading provider of computer-based testing services. Candidates have 90 minutes to complete the exam and must achieve a passing score of at least 60% to receive the certification.
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Huawei H12-831_V1.0 Exam is an important certification for IT professionals who want to enhance their knowledge and skills in advanced routing and switching technologies. HCIP-Datacom-Advanced Routing & Switching Technology V1.0 certification demonstrates the candidate's expertise in Huawei networking technologies and provides them with the credentials necessary to advance their careers in the IT industry.
NEW QUESTION # 233
Which of the following statements about the OSPFv3 message format is correct? (Multiple choice)
Answer: B,C,D
NEW QUESTION # 234
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 # 235
An engineer uses two routers to test IPv6 services, and simulates the headquarters and branches by running BGP4+ of interconnection. As shown in the figure, an engineer captures packets to view the update packets sent by R1. About this message Description of information, which of the following statements is correct
Answer: A
NEW QUESTION # 236
The configuration shown in the figure is performed on R2 to filter all received routes. Assuming that there is a BGP route with the AS_Path attribute of [100 200 300 400] on R1 that needs to be sent to R2, please help the network administrator to adjust the order of AS in the AS_Path attribute of the route on R1 to ensure that the routing entries will not be filtered by the routing policy of R2. (Sorting questions)
Answer: A,B,C,D
NEW QUESTION # 237
A network engineer provides a troubleshooting report after rectifying a fault. The actual network is simplified into the one shown in the figure, where:
* R1 and R2 both have OSPF enabled.
* R1 and R2 function as the gateways for PC1 and PC2, respectively.
Given this, which of the following statements are true?
Options:
Answer: B,C,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
1. Understanding the Network Topology
* R1 and R2 are OSPF-enabled routers connected via the 10.0.12.0/24 subnet (Area 0).
* PC1 (192.168.1.2/30) is connected to R1 via GE0/0/1.
* PC2 (192.168.1.22/30) is connected to R2 via GE0/0/1.
* OSPF ensures that R1 and R2 know about each other's directly connected networks.
2. Analyzing Connectivity
* Can R1 ping 192.168.1.22 (PC2)?
* Yes, if routing is properly configured.
* OSPF ensures that R1 learns about 192.168.1.22 from R2.
* Since R1 has a route to 192.168.1.22 via R2, it can ping PC2 successfully.
* # Option A is correct.
* Can R1 ping 192.168.1.21 (R2's interface)?
* Yes, since R1 and R2 are OSPF neighbors.
* R1 learns 192.168.1.21 via OSPF and can reach it directly.
* # Option B is correct.
* Can R2 ping 192.168.1.2 (PC1)?
* Yes, since OSPF ensures that R2 learns about 192.168.1.2 from R1.
* Since R2 has a route to 192.168.1.2 via R1, it can ping PC1 successfully.
* # Option C is correct.
* Can PC1 and PC2 ping each other?
* Yes, if default gateways and routing are configured correctly.
* If R1 and R2 can ping each other and forward packets, PC1 and PC2 should be able to communicate.
* # Option D is incorrect because PC1 and PC2 should be able to ping each other.
Final Answer:
# A, B, and C are correct.
HCIP-Datacom-Advanced Routing & Switching Technology References:
* OSPF Inter-Router Communication and Route Advertisement
* Default Gateway and Routing in Multi-Router Networks
* Troubleshooting End-to-End Connectivity in Routed Networks
NEW QUESTION # 238
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