Question

What is a Firewall in Computer Network?

• A. The physical boundary of Network
• B. An operating system of Computer Network
• C. A system designed to prevent unauthorized access
• D. A web browsing software

Hint:

Firewall = security guard of a network.

Answer 1

The Correct Option is C

Concept: Firewall is a network security mechanism.

Step 1: Purpose To monitor incoming and outgoing traffic.

Step 2: Filtering Blocks unauthorized or malicious access.

Step 3: Types Hardware firewall and software firewall.

Step 4: Function Applies security rules for data packets.

Step 5: Conclusion \[ \boxed{\text{System preventing unauthorized access}} \]

Final Answer: \[ \boxed{(C)} \]