easyMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show ip route ospf
Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2 E1 - OSPF external type 1, E2 - OSPF external type 2 i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2 ia - IS-IS inter area, * - candidate default, U - per-user static route o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP a - application route + - replicated route, % - next hop override
Gateway of last resort is not set
10.0.0.0/8 is variably subnetted, 5 subnets, 2 masks O 10.1.1.0/24 [110/20] via 192.168.1.2, 00:15:30, GigabitEthernet0/0 O 10.2.2.0/24 [110/30] via 192.168.1.2, 00:15:30, GigabitEthernet0/0
Based on this output, which statement is correct?
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 router has two OSPF routes to different subnets.
The output shows two OSPF routes via the same next hop. The administrative distance is 110 (default for OSPF), and the metrics are 20 and 30. No problems are indicated; the routes are present and valid.
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 router has a default route via OSPF.
Why it's wrong here
The output says 'Gateway of last resort is not set'.
- ✓
The router has two OSPF routes to different subnets.
Why this is correct
Two OSPF routes are listed: 10.1.1.0/24 and 10.2.2.0/24.
- ✗
The OSPF neighbor is down.
Why it's wrong here
Routes are present, so the neighbor is up.
- ✗
The metric for 10.2.2.0/24 is 20.
Why it's wrong here
The metric is 30, not 20.
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.
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
DMVPN Phase 2
DMVPN Phase 2 is an advanced Cisco routing technology that allows spoke routers to communicate directly with one another without sending traffic through a central hub, using dynamic routing protocols and multipoint GRE tunnels.
Key term
OSPF Special Area Types
OSPF special area types are configurations within an OSPF network that limit the type of routing information shared across an area to reduce routing table size and processing overhead.
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