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 scrutinizes and regulates incoming and outgoing network traffic according to predefined security rules. It functions as a protective barrier between a trusted network and untrusted networks, such as the internet, to prevent unauthorized access while permitting legitimate communication.
- Encrypting data transmissions (A) involves protocols like SSL/TLS and is not the core purpose of a firewall.
- Storing user authentication data (C) falls outside the scope of a firewall's functionality; authentication is typically managed by separate security systems.
- Compressing network packets (D) is unrelated to firewalls; packet compression is performed by compression algorithms.
Therefore, the correct designation is (B): firewalls manage network traffic according to established security policies.