easyMultiple Choice
350-401 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 192.168.1.0/24
BGP routing table entry for 192.168.1.0/24, version 15 Paths: (1 available, best #1, table default) Advertised to update-groups: 1 Refresh Epoch 1 65050, (received & used)
10.0.1.2 from 10.0.1.2 (10.0.0.2)
Origin IGP, metric 0, localpref 100, weight 0, valid, external, best rx pathid: 0, tx pathid: 0x0
Based on this output, what can be concluded?
⚠ Common exam trap
Cisco often tests the distinction between 'valid' and 'best' — candidates may incorrectly assume that an external route is automatically invalid or that 'external' implies a problem, but the output clearly shows the route is both valid and best.
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 is from AS 65050 and is the best path.
The output shows the BGP table entry for 192.168.1.0/24 with path 65050, and the line 'valid, external, best' confirms that this route is from AS 65050 and is selected as the best path. The 'best' keyword in the status flags directly indicates that this path is the best among all available paths for this prefix.
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 was learned from an internal BGP peer.
Why it's wrong here
The show command marks this prefix as learned from an 'external' peer, which in BGP terminology directly identifies an eBGP session—a session between neighbors in different autonomous systems. Had it been learned from an internal BGP peer, the output would have shown 'internal' and the neighbor would reside in the same AS as the local router. Therefore this statement is incorrect for this eBGP-learned route.
- ✓
The route is from AS 65050 and is the best path.
Why this is correct
The AS_PATH attribute in the output lists '65050', indicating that the route's origin is AS 65050 and that this prefix was advertised across the AS boundary from that autonomous system. Additionally, the route is flagged as 'best', meaning it has survived all tie-breaking steps in the BGP best-path selection algorithm and will be installed in the routing table. This combination of the correct origin AS and the 'best' flag makes this the only accurate statement.
- ✗
The route has a local preference of 0.
Why it's wrong here
The LOCAL_PREF attribute shown for this route is not 0; it is the default value of 100, which is a common setting for routes learned from eBGP peers. Local preference is an integer that influences outbound BGP route selection, where higher values are preferred when multiple paths exist to the same destination. A value of 0 would place this route at the bottom of preference and is not what this output displays.
- ✗
The route is not valid because it is external.
Why it's wrong here
An eBGP route is not invalid simply because it is external; in fact, external routes are the normal way networks learn prefixes from other autonomous systems. The BGP output explicitly labels this prefix as 'valid', meaning it has passed BGP's validation checks, such as having a resolvable next hop and no AS-path loop. The 'external' designation only describes how the route was learned, not its validity, so this option misinterprets the output.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-401 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 350-401 exam.