mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot a…
A network engineer runs the following command to troubleshoot a Device Access Control issue:
R1# debug ip bgp updates
BGP(0): 10.1.1.2 rcv UPDATE w/ attr: nexthop 10.1.1.2, origin i, metric 0, path 65002 BGP(0): 10.1.1.2 rcv UPDATE about 192.168.1.0/24 -- DENIED due to: community no-export;
What does this output indicate?
⚠ Common exam trap
Cisco often tests the distinction between a route being denied due to an inbound filter versus being accepted but then restricted from outbound advertisement; the trap here is assuming that the no-export community only affects outbound behavior, when in fact it can be used in inbound policies to reject routes entirely.
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 route 192.168.1.0/24 is denied because of the no-export community, which prevents it from being advertised to any peer.
The debug output explicitly states 'DENIED due to: community no-export'. The no-export community (0xFFFFFF01) prevents the route from being advertised to any eBGP peer, but it does not prevent the route from being received or installed in the local BGP table. However, in this context, the router is denying the incoming update because of an inbound policy that matches the no-export community and rejects the route. Option B correctly identifies that the route is denied due to the no-export community, which stops it from being advertised to any peer.
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 route 192.168.1.0/24 is accepted and installed in the BGP table because the community is no-export.
Why it's wrong here
The update is explicitly denied due to the no-export community; it is not accepted.
- ✓
The route 192.168.1.0/24 is denied because of the no-export community, which prevents it from being advertised to any peer.
Why this is correct
The no-export community causes the route to be denied from being advertised to any eBGP peer; this debug confirms the denial.
- ✗
The route 192.168.1.0/24 is denied because of an inbound prefix-list filter.
Why it's wrong here
The debug explicitly states 'community no-export' as the reason, not a prefix-list.
- ✗
The route 192.168.1.0/24 is accepted but marked with no-export for outbound filtering.
Why it's wrong here
The update is denied inbound; it is not accepted into the BGP table at all.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 300-410 question from scratch — 1,966 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
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.