Question 1,524 of 2,152

Route Redistribution →hardMultiple SelectObjective-mapped

Using Route Maps for Route Redistribution

This 300-410 practice question tests your understanding of route redistribution. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Which THREE statements are true regarding the use of route maps for route redistribution? (Choose THREE.)

A
A route map used in redistribution can match on a prefix list to selectively redistribute only specific networks.
Correct. Route maps can match on prefix lists to control which networks are redistributed.
B
If a route map is applied to a redistribution command and no 'permit' statement matches, all routes are denied by default.
Correct. A route map ends with an implicit deny; if no explicit 'permit' statement matches, routes are not redistributed.
C
The 'set metric' command within a route map can only be used to increase the metric of redistributed routes, not decrease it.
Why wrong: Incorrect. The 'set metric' command can increase or decrease the metric.
D
Route maps can change the administrative distance of redistributed routes by using the 'set distance' command.
Why wrong: Incorrect. Route maps do not support 'set distance'; administrative distance is set separately.
E
Route maps can match on the route tag using the 'match tag' command, allowing filtering based on manually assigned tags.
Why wrong: Incorrect. While route maps can match on tags, the command is 'match route-tag', not 'match tag', and this is not a standard usage in redistribution.

Full breakdown with real-world context →

Quick Answer

The correct answer is that route maps can match on the route tag using the 'match tag' command, allowing filtering based on manually assigned tags. This is true because route maps provide granular control during route map redistribution usage, enabling you to selectively filter or modify routes based on attributes like tags, prefix lists, or metrics. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding of how redistribution policies are built—a common trap is assuming route maps automatically permit all routes, but in reality, an explicit 'permit' statement is required for any route to be redistributed. Another key point is that route maps cannot change administrative distance; that is handled separately with the 'distance' command. For a quick memory tip, remember that route maps are for matching and setting attributes during redistribution, not for altering trustworthiness—think "match and set, not distance yet."

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 route map used in redistribution can match on a prefix list to selectively redistribute only specific networks.

Route maps in redistribution allow granular control. They can match on prefix lists (option A is true). If a route map is applied and no 'permit' statement matches, all routes are denied by default (option B is true). Option C is false because 'set metric' can both increase and decrease metric. Option D is false because route maps do not have a 'set distance' command; administrative distance is set with the 'distance' command. Option E is false because the correct command to match on route tags in redistribution is 'match route-tag', not 'match tag'.

Key principle: ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

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 route map used in redistribution can match on a prefix list to selectively redistribute only specific networks.
Why this is correct
Correct. Route maps can match on prefix lists to control which networks are redistributed.
Related concept
Standard ACLs match source addresses.
✓
If a route map is applied to a redistribution command and no 'permit' statement matches, all routes are denied by default.
Why this is correct
Correct. A route map ends with an implicit deny; if no explicit 'permit' statement matches, routes are not redistributed.
Related concept
Standard ACLs match source addresses.
✗
The 'set metric' command within a route map can only be used to increase the metric of redistributed routes, not decrease it.
Why it's wrong here
Incorrect. The 'set metric' command can increase or decrease the metric.
✗
Route maps can change the administrative distance of redistributed routes by using the 'set distance' command.
Why it's wrong here
Incorrect. Route maps do not support 'set distance'; administrative distance is set separately.
✗
Route maps can match on the route tag using the 'match tag' command, allowing filtering based on manually assigned tags.
Why it's wrong here
Incorrect. While route maps can match on tags, the command is 'match route-tag', not 'match tag', and this is not a standard usage in redistribution.

Common exam traps

Common exam trap: ACLs stop at the first match

ACLs are processed top to bottom. The first matching entry wins, and an implicit deny usually exists at the end.

Trap categories for this question

Command / output trap
Incorrect. The 'set metric' command can increase or decrease the metric.

Detailed technical explanation

How to think about this question

ACL questions test precision: source, destination, protocol, port and direction. A generally correct ACL can still fail if it is applied on the wrong interface or in the wrong direction.

KKey Concepts to Remember

Standard ACLs match source addresses.
Extended ACLs can match source, destination, protocol and ports.
The first matching ACL entry is used.
There is usually an implicit deny at the end.

TExam Day Tips

Check inbound versus outbound direction.
Read the ACL from top to bottom.
Look for a broader permit or deny above the intended line.

Key takeaway

ACLs process entries top to bottom and stop at the first match. Entry order and interface direction matter as much as the permit or deny statement.

Real-world example

How this comes up in practice

A security administrator must allow nursing staff to reach a patient records server while blocking access from the guest Wi-Fi VLAN. After applying an extended ACL, traffic is still blocked from nursing workstations. The ACL was applied outbound instead of inbound on the wrong interface. Questions like this test ACL direction and placement rules.

What to study next

Got this wrong? Here's your next step.

Review ACL processing order, placement rules (standard near destination, extended near source), and inbound vs outbound direction. Study wildcard masks and implicit deny. Then practise related 300-410 ACL questions on filtering logic and placement.

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FAQ

Questions learners often ask

What does this 300-410 question test?

Route Redistribution — This question tests Route Redistribution — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: A route map used in redistribution can match on a prefix list to selectively redistribute only specific networks. — Route maps in redistribution allow granular control. They can match on prefix lists (option A is true). If a route map is applied and no 'permit' statement matches, all routes are denied by default (option B is true). Option C is false because 'set metric' can both increase and decrease metric. Option D is false because route maps do not have a 'set distance' command; administrative distance is set with the 'distance' command. Option E is false because the correct command to match on route tags in redistribution is 'match route-tag', not 'match tag'.

What should I do if I get this 300-410 question wrong?

What is the key concept behind this question?

Standard ACLs match source addresses.

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