mediumMultiple 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 route-map
route-map FILTER_OSPF, permit, sequence 10 Match clauses:
ip address prefix-list OSPF_ROUTES
Set clauses: Policy routing matches: 0 packets, 0 bytes route-map FILTER_OSPF, deny, sequence 20 Match clauses: Set clauses: Policy routing matches: 0 packets, 0 bytes
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 route-map will permit all routes that match the prefix-list OSPF_ROUTES and deny all others.
The route-map FILTER_OSPF has two sequences: sequence 10 permits routes matching prefix-list OSPF_ROUTES, and sequence 20 denies all other routes (since no match clause). The match counters show 0 packets/bytes, indicating no traffic has been matched yet, but this is a route-map used for route filtering, not policy routing. The correct answer is that the route-map will deny all routes not matching the prefix-list.
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-map will permit all routes that match the prefix-list OSPF_ROUTES and deny all others.
Why this is correct
Sequence 10 permits matching routes; sequence 20 denies everything else.
- ✗
The route-map will permit all routes because sequence 20 has no match clause.
Why it's wrong here
A deny sequence without a match clause denies all unmatched routes.
- ✗
The route-map is used for policy-based routing and has matched 0 packets.
Why it's wrong here
The counters show 0, but route-maps can be used for both PBR and route filtering; this output doesn't indicate usage.
- ✗
The route-map will deny only routes matching the prefix-list OSPF_ROUTES.
Why it's wrong here
Sequence 10 permits matching routes; sequence 20 denies others.
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
BGP Prefix Filtering
BGP Prefix Filtering is the practice of controlling which network routes (prefixes) a router accepts or advertises to its BGP neighbors, preventing unwanted or harmful routes from spreading across the internet.
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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.