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300-410 Practice Question: Which TWO statements correctly describe the…
Which TWO statements correctly describe the behavior of the 'default-information originate' command in the context of route redistribution? (Choose TWO.)
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
✓
In OSPF, the 'default-information originate' command always injects a default route into the OSPF domain, even if no default route exists in the routing table, provided the 'always' keyword is used.
The 'default-information originate' command in OSPF and EIGRP has specific behaviors. In OSPF, it always originates a default route regardless of the routing table, unless the 'always' keyword is omitted and there is no default route in the routing table. In EIGRP, it requires a default route in the routing table to inject the default, unless the 'always' keyword is used. The command does not automatically redistribute all routes; it only injects a default route.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
In OSPF, the 'default-information originate' command always injects a default route into the OSPF domain, even if no default route exists in the routing table, provided the 'always' keyword is used.
Why this is correct
Correct. The 'always' keyword forces OSPF to originate a default route even if no default route is present in the routing table.
- ✗
In EIGRP, the 'redistribute static' command automatically injects a default route if a static default route is configured.
Why it's wrong here
Incorrect. Redistributing static routes into EIGRP will only inject the static default route if it is present, but EIGRP does not automatically generate a default route; you must use the 'default-information originate' command or redistribute the static route explicitly.
- ✓
In EIGRP, the 'default-information originate' command will inject a default route only if a default route is present in the routing table, unless the 'always' keyword is configured.
Why this is correct
Correct. By default, EIGRP's 'default-information originate' requires a default route in the routing table to inject it. The 'always' keyword overrides this requirement.
- ✗
In OSPF, the 'default-information originate always' command will inject a default route even if OSPF is not configured on any interface.
Why it's wrong here
Incorrect. OSPF must have at least one active interface with OSPF enabled for the 'default-information originate' command to work. The command does not function if OSPF is not operational.
- ✗
In both OSPF and EIGRP, the 'default-information originate' command automatically redistributes all connected routes into the routing protocol.
Why it's wrong here
Incorrect. The 'default-information originate' command only injects a default route (0.0.0.0/0). It does not redistribute any other routes.
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
OSPF Neighbor Adjacency and Basics
Key term
OSPF Default Route Advertisement
OSPF Default Route Advertisement is the process by which a router using the OSPF routing protocol tells other routers to send all traffic for unknown destinations to it, acting as a gateway of last resort.
Key term
Route Redistribution Between Protocols
Route redistribution between protocols is the process of taking routes learned from one routing protocol and injecting them into another routing protocol so that networks using different protocols can communicate.
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Same concept, more angles
1 more way this is tested on 300-410
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which statement correctly describes the behavior of the 'default-information originate' command in OSPF?
medium- A.It always injects a default route into OSPF regardless of the routing table.
- B.It injects a default route as a Type 3 LSA.
- ✓ C.It injects a default route as a Type 5 LSA only if a default route exists in the routing table.
- D.It injects a default route as a Type 7 LSA in all OSPF areas.
Why C: The 'default-information originate' command in OSPF generates a default route (0.0.0.0/0) as a Type 5 LSA, but only if a default route exists in the routing table, unless the 'always' keyword is used.
JA
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.