hardMultiple SelectObjective-mapped
300-410 Practice Question: Which TWO statements about using prefix-lists in…
Which TWO statements about using prefix-lists in conjunction with route-maps for filtering IPv4 routes are true? (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
✓
A prefix-list entry with "ge 24" matches any prefix with a subnet mask greater than or equal to 24 bits.
Prefix-lists can match on prefix length and subnet mask using ge and le operators. A prefix-list entry can be configured to permit or deny. When used in a route-map, the match ip address prefix-list command references the prefix-list. If the prefix-list denies, the route-map clause is not matched, and the route falls to the next clause. The prefix-list can also be used directly in a distribute-list without a route-map.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
A prefix-list entry with "ge 24" matches any prefix with a subnet mask greater than or equal to 24 bits.
Why this is correct
Correct. The ge (greater or equal) operator matches prefixes with a mask length >= the specified value.
- ✓
A route-map with a match ip address prefix-list command will process the route only if the prefix-list permits the route.
Why this is correct
Correct. The match is successful only if the prefix-list has a permit entry that matches the route.
- ✗
A prefix-list can be used directly in a route-map without a match command.
Why it's wrong here
Incorrect. A route-map requires a match command to reference a prefix-list; the prefix-list cannot be called directly.
- ✗
The le operator in a prefix-list matches prefixes with a mask length less than the specified value.
Why it's wrong here
Incorrect. The le (less or equal) operator matches prefixes with a mask length <= the specified value, not less than.
- ✗
A prefix-list can only be used with route-maps, not with distribute-lists.
Why it's wrong here
Incorrect. Prefix-lists can be used with distribute-lists directly (e.g., distribute-list prefix-list name in).
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Related to this question
Learn chapter
OSPF Route Summarization and Filtering
Key term
ACL for Routing Protocols
An ACL for Routing Protocols is a set of rules used to filter routing updates between routers, controlling which network routes are advertised or accepted to improve security and stability.
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.