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CRISC Practice Question: Refer to the exhibit

Exhibit

Firewall Rule Configuration:

Rule 10: Allow TCP 3389 from 192.168.1.0/24 to 10.0.0.5

Refer to the exhibit. Which risk is MOST directly identified?

⚠ Common exam trap

The trap here is that candidates may misinterpret a network diagram or ACL as indicating a denial of service vulnerability (Option A) because they focus on the inbound traffic volume or source, rather than recognizing that the specific risk is the exposure of a management interface to unauthorized remote access.

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

Unauthorized remote access to a critical server

The exhibit (not shown) likely depicts a network diagram or access control list (ACL) configuration that allows inbound traffic from the internet to a critical server on a restricted port (e.g., RDP on TCP 3389 or SSH on TCP 22). This directly identifies the risk of unauthorized remote access, as an attacker could exploit this exposed management interface to gain control of the server. The other options are not directly indicated by such a configuration.

Answer analysis

Option-by-option breakdown

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

  • Denial of service vulnerability

    Why it's wrong here

    The rule is permissive, not directly DoS related.

  • Malware propagation across subnets

    Why it's wrong here

    The rule does not specifically address malware propagation.

  • Weak password policy

    Why it's wrong here

    Password policy is not shown in the rule.

  • Unauthorized remote access to a critical server

    Why this is correct

    Allowing RDP from a broad range increases unauthorized access risk.

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 by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

This CRISC practice question is part of Courseiva's free ISACA 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 CRISC exam.