network security

which of the following can act as a firewall?

• host server

• web server

• application server

• proxy server

which of the following is a malicious software that on execution runs its owns code and modifies other computer programs?

• virus

• spam

• spyware

• adware

in computing -----------is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules.

• spyware

• cookies

• spam

• firewall

unsolicited electronic message sent for marketing purposes are called --------

• virus

• URL

• spam

• unzip

a computer virus is a ------------------------

• software

• hardware

• freeware

• bacteria