India Exam Junction
[PSSSB JE (CIVIL PUB HEALTH), 2024]
10. What is the function of a firewall in computer security?
To decrypt data during transmission
To control access to a network and filter incoming/ outgoing traffic
To encrypt data during transmission
To monitor system performance
Correct Answer :
To control access to a network and filter incoming/ outgoing traffic
Solution
Firewall: A firewall is a security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. It acts as a barrier between a trusted internal network and untrusted external networks, such as the internet.
Purpose: The firewall filters the data packets, allowing or blocking them based on security criteria, thereby protecting the network from unauthorized access, cyber attacks, and other threats.