SAC Networking and Security Fundamentals 2

Question 1

Which protocol uses port 443 and provides encrypted communication for web traffic?

Accepted Answer

HTTPS

Answer

HTTPS uses TLS/SSL encryption over port 443 to secure web communications.

Question 2

What is the primary purpose of a VLAN in a network?

Accepted Answer

Segment network traffic logically without additional hardware

Answer

VLANs logically segment broadcast domains on a switch, improving security and traffic management.

Question 3

An administrator needs to block external access to an internal web server except on port 80 and 443. Which device is BEST suited for this?

Accepted Answer

Firewall

Answer

A firewall filters traffic based on rules, allowing only specified ports while blocking others.

Question 4

Which type of DNS record maps a hostname to an IPv4 address?

Accepted Answer

A

Answer

The DNS A record maps a fully qualified domain name to an IPv4 address.

Question 5

What does the principle of least privilege mean in security?

Accepted Answer

Users are granted only the permissions needed to perform their job

Answer

Least privilege limits user access rights to only what is necessary, reducing the attack surface.

(SAC) System Administration Certification Practice Test