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300-410 Practice Question: Which TWO configuration steps are required to…
Which TWO configuration steps are required to apply an IPv4 extended access list to an interface in Cisco IOS? (Choose TWO.)
⚠ Common exam trap
Cisco often tests the distinction between `ip access-group` (for interfaces) and `access-class` (for VTY lines), leading candidates to mistakenly choose `access-class` when the question specifies an interface.
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
✓
Configure the ACL using access-list or ip access-list commands.
An IPv4 extended ACL must first be defined using either the numbered `access-list` command or the named `ip access-list extended` command before it can be applied. Option B is correct because the `ip access-group` command is the only way to bind a configured ACL to an interface in Cisco IOS, specifying the direction (in or out) and optionally the VLAN filter.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure the ACL using access-list or ip access-list commands.
Why this is correct
The ACL must be defined first with permit/deny entries.
- ✓
Apply the ACL to the interface with the ip access-group command.
Why this is correct
This command binds the ACL to an interface in the specified direction.
- ✗
Create the ACL directly under the interface configuration mode.
Why it's wrong here
ACLs are created globally, not under interface configuration.
- ✗
Use the access-class command on the interface.
Why it's wrong here
The 'access-class' command is used on VTY lines, not on interfaces.
- ✗
Enable the ACL with the ip inspect command.
Why it's wrong here
The 'ip inspect' command is for firewall inspection, not ACL application.
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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.