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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 ip eigrp interfaces
EIGRP-IPv4 Interfaces for AS(100)
Interface Peers Xmit Queue Mean Pacing Time Multicast Pending
Un/Reliable SRTT Un/Reliable Flow Timer Routes Gi0/0 1 0/0 12 0/10 50 0 Gi0/1 1 0/0 15 0/10 55 0
Based on this output, what can be concluded?
⚠ Common exam trap
Cisco often tests the ability to interpret the 'show ip eigrp interfaces' output, specifically the 'Mean SRTT' column, and the trap here is that candidates confuse SRTT with interface bandwidth or fail to recognize that a higher SRTT means higher latency, not necessarily a problem with queue or pending routes.
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
✓
Interface Gi0/1 has higher latency than Gi0/0.
The 'Mean SRTT' (Smooth Round-Trip Time) column shows the average time in milliseconds for EIGRP packets to reach a neighbor and receive an acknowledgment. Gi0/1 has an SRTT of 15 ms, while Gi0/0 has an SRTT of 12 ms, indicating higher latency on Gi0/1. This directly correlates to the path's delay, which EIGRP uses in its composite metric calculation.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Interface Gi0/1 has higher latency than Gi0/0.
Why this is correct
The Mean SRTT is higher on Gi0/1 (15 ms) compared to Gi0/0 (12 ms), indicating higher round-trip time.
- ✗
Both interfaces have pending routes to send.
Why it's wrong here
Pending Routes is 0 for both.
- ✗
The router is using EIGRP named mode.
Why it's wrong here
The output shows 'EIGRP-IPv4 Interfaces for AS(100)', which is classic mode.
- ✗
There is a queue backlog on Gi0/0.
Why it's wrong here
Xmit Queue is 0/0, indicating no backlog.
Quick reference
Routing Protocol Comparison
| Protocol | Metric | Max Hops | Algorithm | Type |
|---|---|---|---|---|
| RIP v2 | Hop count | 15 | Bellman-Ford | Distance vector |
| OSPF | Cost (bandwidth) | Unlimited | Dijkstra (SPF) | Link state |
| EIGRP | Composite metric | Unlimited | DUAL | Hybrid |
| IS-IS | Cost | Unlimited | Dijkstra | Link state |
| BGP | Policy / attributes | Unlimited | Path vector | Path vector |
RIP's 15-hop limit makes it unsuitable for large networks. OSPF and EIGRP dominate modern enterprise deployments.
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Last reviewed: Jun 24, 2026
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