Question 1,308 of 2,152

Policy-Based Routing (PBR) →easyMultiple ChoiceObjective-mapped

PBR match ip address Command

This 300-410 practice question tests your understanding of policy-based routing (pbr). 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 statement about PBR and the 'match ip address' command is correct?

A
It can only match on source IP addresses.
Why wrong: Extended ACLs can match on source, destination, protocol, and ports.
B
It can reference a named or numbered ACL.
Both named and numbered ACLs are supported.
C
It can match on MAC addresses.
Why wrong: PBR does not match on MAC addresses; it uses IP ACLs.
D
It matches packets before routing table lookup.
Why wrong: PBR is applied after the routing table lookup, but before forwarding.

Full breakdown with real-world context →

Quick Answer

The correct answer is that the PBR match ip address command can reference a named or numbered ACL. This is because Policy-Based Routing uses the match ip address clause within a route map to identify traffic based on criteria defined in an access-list, which can be either standard or extended, and the ACL itself can be identified by a number or a descriptive name. On the Cisco CCNP ENARSI 300-410 exam, this concept tests your understanding of how PBR interacts with ACLs to selectively route packets, often appearing in scenario-based questions where you must choose the correct ACL type or format. A common trap is assuming that only numbered ACLs are supported, but Cisco explicitly allows named ACLs for flexibility and readability. Remember the memory tip: “PBR matches IP, and an ACL is just a named or numbered list.”

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

✓

It can reference a named or numbered ACL.

The 'match ip address' command references an access-list (standard or extended) to match packets based on source/destination IP addresses.

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.

✗
It can only match on source IP addresses.
Why it's wrong here
Extended ACLs can match on source, destination, protocol, and ports.
✓
It can reference a named or numbered ACL.
Why this is correct
Both named and numbered ACLs are supported.
Related concept
Standard ACLs match source addresses.
✗
It can match on MAC addresses.
Why it's wrong here
PBR does not match on MAC addresses; it uses IP ACLs.
✗
It matches packets before routing table lookup.
Why it's wrong here
PBR is applied after the routing table lookup, but before forwarding.

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.

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?

Policy-Based Routing (PBR) — This question tests Policy-Based Routing (PBR) — Standard ACLs match source addresses..

What is the correct answer to this question?

The correct answer is: It can reference a named or numbered ACL. — The 'match ip address' command references an access-list (standard or extended) to match packets based on source/destination IP addresses.

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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