| A | B |
| NIC | provides a hardware interface between a computer and a network |
| Internet Protocol Address | the numeric address of a computer |
| Megabyte | equal one million bytes or 1024 KB |
| Modem | "Modulator Demodulator" converts data between analog form used on telephone lines & digital form on computers |
| Node | any device connected to a computer network |
| Octet | represents any eight bit quantity |
| Ping | name of a standard network utiltiy packaged w/popular operating system |
| Ping of Death | hackers use it to crash computers remotely over the Internet |
| Port Number | represent an endpoint or "channel" for network communications |
| Protocol | a "language" of rules and conventions for communication between network devices |
| Repeater | regenerates incoming electrical, wireless or optical signals |
| Routers | physical devices that join multiple wired or wireless networks together |
| Spam | unsolicated commercial advertisements distributed online |
| Network Switch | small device joins multiple computers together at a low-level protocol layer |
| TCP/IP | two distinct network protocols |
| URL | a specially-formatted text string that defines a location on the Internet |
| WAN | a large geographic area network |
| RJ45 Connector | A serial connector which looks like a telephone connector |
| CAT 5 cable | 5th generation of twisted pair Ethernet cabling |
| Peer-to-Peer | network setup that works well for 10 or fewer computers |