hardMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot an…
A network engineer runs the following command to troubleshoot an EIGRP issue:
R1# show ip eigrp topology all-links
IP-EIGRP Topology Table for AS 100
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply, r - Reply status, s - sia Status
P 10.1.1.0/24, 1 successors, FD is 131072 via 10.1.2.2 (131072/130816), GigabitEthernet0/0 via 10.1.3.3 (131328/131072), GigabitEthernet0/1 P 10.2.2.0/24, 1 successors, FD is 131072 via 10.1.2.2 (131072/130816), GigabitEthernet0/0 A 10.3.3.0/24, 0 successors, FD is Infinity via 10.1.2.2 (4294967295/4294967295), GigabitEthernet0/0 via 10.1.3.3 (4294967295/4294967295), GigabitEthernet0/1
What does this output indicate?
⚠ Common exam trap
Cisco often tests the distinction between the 'A' (Active) and 'P' (Passive) codes in the 'show ip eigrp topology all-links' output, and candidates mistakenly assume that seeing two next hops means the route is installed or has feasible successors, ignoring the Active state and Infinity metrics.
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 10.3.3.0/24 is stuck-in-active because replies have not been received from all neighbors.
The 'A' code for route 10.3.3.0/24 indicates it is in the Active state, meaning the router has sent Queries for this route and is waiting for Replies from all neighbors. The FD (Feasible Distance) is 'Infinity' (4294967295), and both successors are 0, confirming the route is not usable. The 's' (sia Status) code is not shown, but the Active state with no successors and infinite metrics directly points to a stuck-in-active (SIA) condition where replies have not been received from all neighbors, causing the route to remain active.
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 10.3.3.0/24 is stuck-in-active because replies have not been received from all neighbors.
Why this is correct
The Active state with FD Infinity and no successors indicates EIGRP is waiting for replies, which can lead to a stuck-in-active condition if not resolved.
- ✗
The route 10.3.3.0/24 is passive and has two feasible successors.
Why it's wrong here
The route is Active, not Passive, and has no successors.
- ✗
The route 10.3.3.0/24 is learned via both neighbors with equal metrics.
Why it's wrong here
The metrics are 4294967295, which indicates unreachable, not equal.
- ✗
The route 10.3.3.0/24 is installed in the routing table via both neighbors.
Why it's wrong here
Active routes are not installed in the routing table.
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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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.