What is the purpose of a firewall in a network security system?

What is the purpose of a firewall in a network security system?
A . To prevent unauthorized access to or from private networks
B . To scan and filter network traffic for potential threats
C . To encrypt data transmitted over the network
D . To provide secure remote access to the network

View Answer

Answer: A

Explanation:

Option 1: Correct. A firewall is designed to prevent unauthorized access to or from private networks by monitoring and controlling network traffic based on predetermined security rules.

Option 2: Incorrect. While a firewall can scan and filter network traffic for potential threats, this is not its primary purpose.

Option 3: Incorrect. While encryption may be a feature of some firewalls, it is not the primary purpose of a firewall in a network security system.

Option 4: Incorrect. While a secure remote access solution may include a firewall, this is not the primary purpose of a firewall in a network security system.