Detailed explanation and options for the selected question.
What is the role of a firewall in computer networks?
A.
To prevent unauthorized access to a network
B.
To provide faster internet speed
C.
To store backup data
D.
To translate domain names into IP addresses
Explanation:
A firewall prevents unauthorized access to a network by monitoring and controlling traffic. Faster internet speed, backups, and DNS translation are unrelated to a firewall's function.