| A | B |
| gateway | A system that joins two networks together |
| FTP | allows one to transfer files between computers on the Internet |
| groupware | software designed to improve the productivity of individuals with common goals or interests |
| hub | small, simple, inexpensive network device that joins multiple computers together |
| IP | world's single most popular network protocol |
| HTTP | allows Web browsers and Web servers to communicate |
| ISP | a company that supplies Internet connectivity to home and business customers |
| LAN | supplies networking capability to a group of computers in close proximity |
| extranet | allows controlled access from the outside for specific business |
| firewall | protects a computer network from unauthorized access |
| upload | involves sending a copy of a file to a remote location |
| download | involves the receipt of a file copied from a remote location |
| DSL | provides high-speed networking over ordinary phone lines |
| emoticon | symbolic facial expression |
| Ethernet | physical and data link layer technology for LANs |
| DHCP | allows a computer to join an IP-based network without a IP address |
| crash | critical failure in a computer |
| cable modem | connects a home computer to residential cable TV service |
| bandwidth | the data supported by a network connection or interface |
| MAC address | provides unique identification and access control for computers on the band |