For a single home user who regularly surfs the Web, exchanges e-mail, and uses instant messaging, a firewall's primary job is to keep viruses from infecting files and prevent Trojan horses from entering the system through hidden openings called ____________________.

Fill in the blank(s) with the appropriate word(s).

back doors

Computer Science & Information Technology

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When files stored on the hard drive are broken up and stored in different places on the disk, the files have been ________

A) optimized B) concentric C) fragmented D) stripped

Computer Science & Information Technology

A block of text that can be automatically inserted at the end of an email message is a(n) ________ line

Fill in the blank(s) with correct word

Computer Science & Information Technology