SAC Foundational Concepts & Principles 3

Question 1

What is the function of a DMZ (Demilitarized Zone) in network architecture?

Accepted Answer

To isolate public-facing servers from the internal network

Answer

A DMZ places public-facing services in a separate network segment, limiting exposure of the internal network if those services are compromised.

Question 2

Which file system feature allows an administrator to revert a volume to a previous state?

Accepted Answer

Snapshots

Answer

File system snapshots capture the state of a volume at a point in time, enabling rollback without a full restore.

Question 3

What does the term 'uptime' measure in system administration?

Accepted Answer

The amount of time a system has been continuously running

Answer

Uptime refers to the duration a system has been operational and available without interruption.

Question 4

Which command-line tool is commonly used on Linux to display real-time system resource usage?

Accepted Answer

top

Answer

The 'top' command displays a dynamic real-time view of CPU, memory, and process activity on Linux systems.

Question 5

What is the purpose of an audit log in system administration?

Accepted Answer

To record system and user activities for accountability and forensics

Answer

Audit logs capture a chronological record of events, enabling administrators to track changes, detect intrusions, and meet compliance requirements.

(SAC) System Administration Certification Practice Test