easyMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R6: R6# show…
A network engineer runs the following command on Router R6:
R6# show ip route 10.0.0.0
Routing entry for 10.0.0.0/8 Known via "eigrp 100", distance 90, metric 28160 Redistributing via eigrp 100 Last update from 192.168.1.1 on GigabitEthernet0/0, 00:00:10 ago Routing Descriptor Blocks:
* 192.168.1.1, from 192.168.1.1, 00:00:10 ago, via GigabitEthernet0/0
Route metric is 28160, traffic share count is 1
Additionally, an OSPF route for the same prefix is learned with distance 110. Which route will be installed in the routing table?
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 EIGRP route will be installed because it has a lower administrative distance.
EIGRP internal routes have a default administrative distance of 90, which is lower than OSPF's default distance of 110. Therefore, the EIGRP route will be preferred and installed in the routing table.
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 OSPF route will be installed because it has a lower metric.
Why it's wrong here
The OSPF route is not installed because administrative distance, not metric, determines route selection between different routing protocols; EIGRP’s default distance of 90 is lower than OSPF’s 110, so the EIGRP route is preferred regardless of metric values. This option is tempting because metric is the decisive factor for choosing among multiple routes within the same routing protocol, where a lower metric does indicate a more preferred path.
- ✓
The EIGRP route will be installed because it has a lower administrative distance.
Why this is correct
EIGRP's distance of 90 is lower than OSPF's 110, so the EIGRP route is preferred.
- ✗
Both routes will be installed for load balancing.
Why it's wrong here
Only the route with the lowest administrative distance is installed. Load balancing requires equal distance and metric.
- ✗
Neither route will be installed due to a conflict.
Why it's wrong here
One route will be installed based on the lowest administrative distance.
Visual reference
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
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