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300-410 Practice Question: Runs the following command to troubleshoot a BGP…
A network engineer runs the following command to troubleshoot a BGP Troubleshooting issue:
R1# show bgp ipv4 unicast 192.168.1.0/24
BGP routing table entry for 192.168.1.0/24, version 12 Paths: (1 available, best #1, table default) Advertised to update-groups: 1 Refresh Epoch 1 65001, (received & used)
10.1.1.2 from 10.1.1.2 (10.1.1.2)
Origin IGP, metric 0, localpref 100, valid, external, best Community: 100:200
What does this output indicate?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The prefix 192.168.1.0/24 has a community attribute of 100:200, which may affect routing decisions.
The show bgp output for a specific prefix shows one path with community 100:200 attached. The community is a BGP community value that can be used for route tagging and policy enforcement. The path is valid and best.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The prefix 192.168.1.0/24 has a community attribute of 100:200, which may affect routing decisions.
Why this is correct
The community 100:200 is shown in the output and can be used for policy.
- ✗
The prefix 192.168.1.0/24 is not installed in the routing table.
Why it's wrong here
The 'best' status indicates it is installed.
- ✗
The prefix 192.168.1.0/24 is being filtered due to the community value.
Why it's wrong here
The prefix is shown as valid and best, so it is not filtered.
- ✗
The community 100:200 indicates the prefix is from a confederation.
Why it's wrong here
Community values are arbitrary; 100:200 does not inherently indicate confederation.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 300-410 exam.