The answer is that both neighbors are fully established and exchanging routing information. This conclusion is drawn directly from the EIGRP neighbor adjacency verification output, where a Queue Count (Q Cnt) of 0 for each neighbor indicates no pending packets, and the non-zero Sequence Numbers (45 and 32) confirm that R1 has received and processed EIGRP updates from both peers, proving the adjacencies are stable and operational. On the ENCOR 350-401 exam, this command tests your ability to read the show ip eigrp neighbors table and distinguish a healthy adjacency from one that is stuck or failing; a common trap is assuming a high RTO or SRTT indicates a problem, but these values are normal for varying link speeds. Remember the key indicator: a Q Cnt of 0 means the neighbor is fully converged, while a non-zero Q Cnt signals a pending update or a potential issue. A useful memory tip is “Zero Queue, Full Route.”
350-401 EIGRP Practice Question
This 350-401 practice question tests your understanding of eigrp. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network engineer runs the following command on Router R1:
R1# show ip eigrp neighbors
EIGRP-IPv4 Neighbors for AS(100)
H Address Interface Hold Uptime SRTT RTO Q Seq
(sec) (ms) Cnt Num
0 192.168.1.2 Gi0/0 13 00:12:34 12 100 0 45
1 10.1.1.2 Gi0/1 12 00:10:20 15 120 0 32
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Both neighbors are fully established and exchanging routing information.
The 'show ip eigrp neighbors' output displays two neighbors in a stable state, indicated by the 'Q Cnt' (Queue Count) of 0 for both, meaning no packets are waiting to be sent. The 'Seq Num' (Sequence Number) values (45 and 32) show that R1 has received and processed EIGRP updates from each neighbor, confirming the adjacency is fully established and routing information is being exchanged. This output does not provide any metric or authentication details, so only the conclusion that both neighbors are fully operational is valid.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Both neighbors are using MD5 authentication.
Why it's wrong here
The output does not display authentication status; authentication is not shown in the neighbor table.
✗
Neighbor 192.168.1.2 has a higher metric than 10.1.1.2.
Why it's wrong here
The neighbor table does not show metrics; metrics are shown in the topology table.
✓
Both neighbors are fully established and exchanging routing information.
Why this is correct
The 'Q Cnt' of 0 and valid uptime indicate stable adjacencies.
Related concept
Read the scenario before looking for a memorised answer.
✗
Router R1 is using EIGRP named mode.
Why it's wrong here
The output shows 'EIGRP-IPv4 Neighbors for AS(100)', which is classic mode; named mode would show 'EIGRP-IPv4 VR' or similar.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the misconception that the 'show ip eigrp neighbors' output reveals authentication status or metric values, but the table only shows transport-layer reliability statistics and adjacency state, not security or routing metric details.
Trap categories for this question
Similar concept trap
The output shows 'EIGRP-IPv4 Neighbors for AS(100)', which is classic mode; named mode would show 'EIGRP-IPv4 VR' or similar.
Command / output trap
The output does not display authentication status; authentication is not shown in the neighbor table.
Detailed technical explanation
How to think about this question
EIGRP uses a Reliable Transport Protocol (RTP) to manage packet delivery, and the 'SRTT' (Smooth Round-Trip Time) and 'RTO' (Retransmission Timeout) values in the neighbor table are key to this mechanism—SRTT is an average of round-trip times to the neighbor, and RTO is calculated as 6 * SRTT (by default) to determine when to retransmit. The 'Hold' timer (13 and 12 seconds) indicates the time remaining before the neighbor is declared dead if no hello packets are received, with the default hold time being 15 seconds (three times the hello interval of 5 seconds on LAN interfaces). In real-world scenarios, a 'Q Cnt' greater than 0 would indicate a stuck or congested adjacency, often due to a mismatch in K-values or a unidirectional link.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 350-401 question in full detail.
EIGRP — This question tests EIGRP — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Both neighbors are fully established and exchanging routing information. — The 'show ip eigrp neighbors' output displays two neighbors in a stable state, indicated by the 'Q Cnt' (Queue Count) of 0 for both, meaning no packets are waiting to be sent. The 'Seq Num' (Sequence Number) values (45 and 32) show that R1 has received and processed EIGRP updates from each neighbor, confirming the adjacency is fully established and routing information is being exchanged. This output does not provide any metric or authentication details, so only the conclusion that both neighbors are fully operational is valid.
What should I do if I get this 350-401 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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