hardMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show bgp ipv4 unicast 10.4.4.0/24
BGP routing table entry for 10.4.4.0/24, version 8 Paths: (1 available, best #1, table default) Not advertised to any peer Refresh Epoch 1 65006
10.1.16.6 from 10.1.16.6 (10.6.6.6)
Origin IGP, metric 0, localpref 100, valid, external, best rx pathid: 0, tx pathid: 0x0
Based on this output, what is the most likely reason the route is not advertised to any peer?
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
✓
There is an outbound route-map or prefix-list filtering the route.
The route is valid and best, but not advertised. This could be due to outbound filtering (route-map, prefix-list) applied to the BGP neighbor, or the neighbor might not be configured to receive this prefix. Another possibility is that the route is suppressed by a policy.
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 has a local preference of 100, which is too low.
Why it's wrong here
Local preference 100 is default and does not prevent advertisement.
- ✓
There is an outbound route-map or prefix-list filtering the route.
Why this is correct
The most common reason for a valid best route not being advertised is outbound filtering applied to the neighbor.
- ✗
The BGP session to the neighbor is down.
Why it's wrong here
If the session were down, the route would not be in the BGP table as learned from that neighbor.
- ✗
The route is not in the routing table.
Why it's wrong here
The route is valid and best, so it should be in the routing table unless overridden by a higher AD route.
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
BGP Prefix Filtering
BGP Prefix Filtering is the practice of controlling which network routes (prefixes) a router accepts or advertises to its BGP neighbors, preventing unwanted or harmful routes from spreading across the internet.
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.