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| Section | Objectives |
|---|---|
| Advanced Routing Protocols | - OSPF Advanced Concepts
|
| Network Design and Troubleshooting | - Troubleshooting methods
|
| IPv6 and Network Services | - IPv6 routing technologies
|
| MPLS and VPN Technologies | - MPLS fundamentals
|
| BGP and Internet Routing | - BGP fundamentals
|
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NEW QUESTION # 122
Both VLAN aggregation and MUX VLAN are deployed on the enterprise network shown in the figure, and all switch interfaces connected to terminals are access interfaces. Given this, match PCI to PC4 with the hosts or servers that they can access on the network. (Note: A host cannot be matched with itself. For example, PCI cannot match PCI.) (Tokens can be reused.)
Answer:
Explanation:
NEW QUESTION # 123
When deploying MPLS/BGP IP VPN, which of the following descriptions is wrong about using BGP to exchange routing information between PEs and CEs?
Answer: B
NEW QUESTION # 124
On the OSPFv3 network shown in the figure, OSPFv3 is enabled on the interfaces connecting R1, R2, and R3. The router ID of each router is 10.0.X.X, where X is the number of the router. If you check detailed information about an LSA on R3, the command output shows that R1 and R2 are DRs on the network.
Answer: B
NEW QUESTION # 125
On the OSPF network shown in the figure, area 1 is a stub area, area 2 is a totally stub area, and area 3 is an NSSA.
Which of the following LSAs does not exist in areas 1, 2, and 3?
Answer: A
NEW QUESTION # 126
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 through the import-route command.
* The aggregate 192.168.1.0/16 detail-suppressed command is configured on R2 .
Which of the following is the path for traffic from R3 to 192.168.1.0/24 ?
Answer: D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
Understanding the BGP Network Topology in the Question:
* EBGP Peering & Route Distribution
* Each router forms EBGP peer relationships with directly connected neighbors .
* BGP learns and propagates routes via EBGP neighbors .
* R1 and R4 advertise the static route 192.168.1.0/24 into BGP .
* Effect of the aggregate 192.168.1.0/16 detail-suppressed Command on R2
* R2 performs BGP route aggregation , summarizing 192.168.1.0/24 into a larger 192.168.1.0
/16 route .
* The detail-suppressed option hides the more specific 192.168.1.0/24 prefix when advertising routes.
* As a result, R2 does not advertise the specific 192.168.1.0/24 route to its neighbors.
Route Selection and Traffic Flow Analysis:
* R1 and R4 originate 192.168.1.0/24 and advertise it via BGP .
* R2 does not advertise the 192.168.1.0/24 route because of the detail-suppressed command .
* R3 cannot learn the specific route from R2 , so it must choose an alternative path via R5 .
* R5 learns 192.168.1.0/24 from R1 and advertises it to R3 .
* Thus, the best available path for R3 to reach 192.168.1.0/24 is R3 # R5 # R1 .
# Correct Path: R3 # R5 # R1
Checking Each Option:
# Option A: R3 # R5 # R1 (Correct)
* R3 learns 192.168.1.0/24 from R5 , and R5 forwards traffic to R1 , which has the static route.
# Option B: R3 # R2 # R1 (Incorrect)
* R2 does not advertise 192.168.1.0/24 due to route summarization (detail-suppressed) , so R3 cannot use R2 as the next hop .
# Option C: R3 # R6 # R5 # R1 (Incorrect)
* This is an unnecessary detour .
* R3 has a direct EBGP connection with R5, so it will use the shortest path (R3 # R5 # R1) instead of going through R6 .
# Option D: R3 # R5 # R4 (Incorrect)
* R3 prefers the shortest AS path to reach 192.168.1.0/24 .
* Since R1 and R4 both advertise the route, R3 will prefer the route via R5 to R1 rather than R4 .
Final Conclusion:
# A. The correct path for traffic from R3 to 192.168.1.0/24 is R3 # R5 # R1.
Thus, the correct answer is: A .
Reference:
HCIP-Datacom-Advanced Routing & Switching Technology V1.0 - BGP Route Aggregation and Detail Suppression Huawei Official HCIP-Datacom Study Guide - BGP Best Path Selection and Aggregation Rules Huawei Documentation on BGP Route Summarization and Impact on Routing Decisions
NEW QUESTION # 127
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