Question

most personal computers have a firewall and virus protection. why are these security programs needed? a. they make sure digital information is sent out as a digital signal. b. they keep harmful programs from entering the computer from the internet. c. they keep analog signals from entering the computer from the internet. d. they keep people from storing personal information on the computer.

Explanation:

Firewalls and virus - protection programs act as barriers. They monitor and control incoming network traffic to prevent malicious software (viruses, malware) from entering the computer via the Internet.

Answer:

B. They keep harmful programs from entering the computer from the Internet.