Question

What is the purpose of a firewall in network security?

• A. To encrypt data transmissions
• B. To monitor and control incoming and outgoing network traffic
• C. To store user authentication data
• D. To compress network packets

Hint:

Firewalls monitor network traffic and block unauthorized access, providing a crucial layer of security in network communications.

Answer 1

The Correct Option is B

A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted network and untrusted networks, such as the internet. Firewalls are used to block unauthorized access while allowing authorized communication.
- To encrypt data transmissions (A) refers to encryption protocols like SSL/TLS, not the primary function of a firewall.
- To store user authentication data (C) is not the function of a firewall. Authentication is usually managed by other security mechanisms.
- To compress network packets (D) is not related to firewalls. Packet compression is handled by compression algorithms.
Thus, the correct answer is (B), firewalls control network traffic based on security policies.