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ISC Practice Question: Systems Security Implementation Verification And Validation

When validating the security implementation of a Cisco ASA firewall, which command provides the most accurate verification of the currently applied Access Control List (ACL) to a specific 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

show access-list

The 'show access-list' command displays the ordered list of rules and their hit counts, which is vital for validation.

Answer analysis

Option-by-option breakdown

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

  • show run interface

    Why it's wrong here

    This shows interface configuration, not the logic of the applied ACL.

  • show version

    Why it's wrong here

    This only displays system hardware and software information.

  • show access-list

    Why this is correct

    This command displays the ACL entries and their hit counts, allowing you to verify traffic filtering.

  • show interface status

    Why it's wrong here

    This provides physical link status, not security rule enforcement details.

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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JA

Written and reviewed by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

Last reviewed August 2026 · checked against the official (ISC)² exam blueprint

This ISC practice question is part of Courseiva's free (ISC)² 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 ISC exam.