mediumMultiple 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 summary
BGP router identifier 10.0.0.1, local AS number 65001 BGP table version is 14, main routing table version 14 4 network entries using 1152 bytes of memory 4 path entries using 320 bytes of memory 2/1 BGP path/bestpath attribute entries using 560 bytes of memory 0 BGP route reflector client to client reflections 2 BGP community entries using 80 bytes of memory
Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd 10.0.1.2 4 65002 2345 2346 14 0 0 00:12:34 3 10.0.1.3 4 65003 1234 1235 14 0 0 00:08:21 2 10.0.1.4 4 65004 567 568 14 0 0 00:05:45 0
Based on this output, what can be concluded?
⚠ Common exam trap
The trap here is that candidates may misinterpret the '0' in the 'State/PfxRcd' column as a session failure or that R1 is not sending prefixes, when it actually indicates the neighbor is not advertising any prefixes to R1.
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
✓
Neighbor 10.0.1.4 is not advertising any prefixes to R1.
The 'State/PfxRcd' column shows the number of prefixes received from each neighbor. Neighbor 10.0.1.4 has a value of 0, meaning it has not advertised any prefixes to R1. The session is established (Up/Down shows 00:05:45), so the neighbor is reachable and the BGP session is up, but it is not sending any prefixes.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Neighbor 10.0.1.4 is in the 'Active' state because it received 0 prefixes.
Why it's wrong here
The output shows the digit '0' in the State/PfxRcd column, not the word 'Active'. In BGP, the State/PfxRcd column displays either a neighbor state (Idle, Connect, Active, OpenConfirm, Established) or, once the session is established, the number of prefixes received. Since a number appears, the session is established; if it were Active, you would see the word 'Active' instead of a digit. Moreover, the Active state relates to the TCP connection setup phase, independent of the number of prefixes received.
- ✗
Neighbor 10.0.1.4 has sent 0 prefixes to R1.
Why it's wrong here
The column labeled 'State/PfxRcd' records prefixes received from the neighbor, not prefixes sent to it. A value of 0 signifies that R1 has learned zero NLRI entries from 10.0.1.4, so the neighbor is not sending any reachable routes. To inspect what R1 has advertised outbound, you would use 'show ip bgp neighbors 10.0.1.4 advertised-routes', whereas PfxRcd reflects only the inbound direction. Therefore, this option incorrectly interprets the direction of the prefix counter.
- ✓
Neighbor 10.0.1.4 is not advertising any prefixes to R1.
Why this is correct
The value 0 in the State/PfxRcd column means the BGP session with 10.0.1.4 is fully established (otherwise a state word would appear), but R1 has not received any network-layer reachability information from that neighbor. This situation occurs when 10.0.1.4 has no routes to advertise, or an outbound route-map, prefix-list, or filter is suppressing its advertisements. Since the session is up, the lack of prefixes is a routing-policy outcome, not a session failure. Thus, the neighbor is simply not advertising any prefixes to R1.
- ✗
The BGP session with 10.0.1.4 is down.
Why it's wrong here
If the BGP session were down, the State/PfxRcd column would display a BGP state such as Idle, Active, or Connect rather than a numeric prefix count. The appearance of the digit '0' confirms that the session is in the Established state; BGP keepalives are being exchanged and the TCP connection is intact. Even though 0 prefixes are received, the session remains operationally up and is not down. This option incorrectly equates an empty prefix table with a failed BGP adjacency.
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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.