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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 ip interface GigabitEthernet0/1

GigabitEthernet0/1 is up, line protocol is up Internet address is 10.1.1.1/24 Broadcast address is 255.255.255.255 Address determined by non-volatile memory MTU is 1500 bytes Helper address is not set Directed broadcast forwarding is disabled Outgoing access list is 101 Inbound access list is not set

Based on this output, which statement is correct?

⚠ Common exam trap

Cisco often tests the distinction between inbound and outbound ACL application by showing only one direction in the output, leading candidates to assume no ACL is applied or that it applies to both directions.

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

ACL 101 filters traffic leaving the interface.

The command output shows 'Outgoing access list is 101', which indicates that ACL 101 is applied to filter traffic leaving the GigabitEthernet0/1 interface. This is confirmed by the absence of an 'Inbound access list' entry, meaning no ACL is applied to incoming traffic. Therefore, ACL 101 filters traffic leaving the interface.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ACL 101 filters traffic entering the interface.

    Why it's wrong here

    The inbound access list is not set, so no ACL filters incoming traffic.

  • ACL 101 filters traffic leaving the interface.

    Why this is correct

    The output shows 'Outgoing access list is 101', so traffic exiting is filtered.

  • The interface has no ACL applied.

    Why it's wrong here

    There is an outbound ACL applied.

  • ACL 101 is applied in both directions.

    Why it's wrong here

    Only outbound ACL is set; inbound is not set.

Visual reference

Source Router + ACL permit 10.0.0.0/8 deny any Server 10.0.0.5 ✓ 192.168.1.1 ✗ dropped ACLs evaluate top-down; first match wins — implicit deny all at end

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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.