BROADBAND: Broad bandwidth networking. High-speed Internet connections, like DSL (Digital Subscriber Line), Cable Internet, and 3G (Third
Generation) cellular services.
DSL: Digital Subscriber Line. One of the most common ways to bring Internet to homes and small businesses over a telephone line at up to
12 Megabits/second.
CABLE OR CABLE INTERNET: The other most common way to bring Internet to homes over cable TV lines at speeds ranging from 1.5 to 50
Megabits/second.
FiOS: Fiber-Optic Service. An emerging technology that provides Internet to homes and offices over fiber-optic cables at speeds from 15 to 50
Megabits/second.
WI-FI: …

Anti-virus : Software that scans your pc for viruses, worms, and trojans using up-to-date virus signatures. Once found, the program can remove, or quarantine the virus and (ideally) keep it from performing whatever malicious duties is was sent to do.
Attack: An attempt by an unauthorized individual or program to gain control over aspects of your pc for various purposes.
Backdoor: This is sometimes referred to as a trapdoor, and is a feature in programs that the original programmer puts into the code in order to fix bugs or make other changes …