What is the primary function of a firewall in a computer network?

Correct option is B

A firewall is a network security system designed to block unauthorized access while permitting authorized communications. It acts as a barrier between a trusted internal network and untrusted external networks, such as the internet, by filtering incoming and outgoing traffic based on predetermined security rules.
Important Key Points:
1. Firewalls are essential for preventing cyberattacks and unauthorized access to sensitive data on a network.
2. Firewalls can be implemented in both hardware and software forms, providing protection for individual devices or entire networks.
Knowledge Booster:
· Monitoring CPU performance is not the function of a firewall; this task is handled by system monitoring tools.
· Increasing internet speed is not a function of a firewall; it works to secure the network, not optimize performance.
· Storing data is the job of storage devices, not firewalls.
· Managing software updates is a task performed by update management tools, not firewalls.