hardMultiple 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 REDISTRIBUTE
route-map REDISTRIBUTE, permit, sequence 10 Match clauses:
ip address prefix-list EIGRP_ROUTES
Set clauses: metric 100 metric-type type-1 tag 200 Policy routing matches: 0 packets, 0 bytes
route-map REDISTRIBUTE, deny, sequence 20 Match clauses:
ip address prefix-list DENY_ALL
Set clauses: Policy routing matches: 0 packets, 0 bytes
Based on this output, what is the problem?
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 has a deny sequence that may block all routes if prefix-list DENY_ALL is configured to permit all.
The route-map has a deny sequence 20 that matches prefix-list DENY_ALL. If DENY_ALL is configured to permit all (e.g., permit 0.0.0.0/0 le 32), then all routes will be denied after sequence 10, effectively blocking redistribution. The problem is that the deny sequence may unintentionally block routes that should be redistributed.
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 redistribute all routes that match prefix-list EIGRP_ROUTES with metric 100 and type-1.
Why it's wrong here
While sequence 10 permits matching routes, sequence 20 denies all routes if DENY_ALL matches everything, so redistribution may fail.
- ✓
The route-map has a deny sequence that may block all routes if prefix-list DENY_ALL is configured to permit all.
Why this is correct
If DENY_ALL is a catch-all prefix-list (e.g., permit 0.0.0.0/0 le 32), then sequence 20 will deny all routes, overriding sequence 10.
- ✗
The route-map will only redistribute routes with tag 200.
Why it's wrong here
The tag is set, not matched; redistribution is based on match clauses, not set clauses.
- ✗
The route-map is not applied to any redistribution command, so it has no effect.
Why it's wrong here
The output shows the route-map is defined, but we don't know if it is applied; however, the question is about the route-map itself.
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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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.