| ZyAIR 100 Wireless PC Card |
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MAC | On a local area network (LAN) or other network, the MAC (Media Access Control) address is |
| your computer’s unique hardware number. (On an Ethernet LAN, it is the same as your |
| Ethernet address.) The MAC layer frames data for transmission over the network, then passes |
| the frame to the physical layer interface where it is transmitted as a stream of bits. |
Megahertz | One million cycles per second. A unit of measure for frequency. |
(MHz) |
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Modulation | Any of several techniques for combining user information with a transmitter's carrier signal. |
Network | Any time you connect 2 or more computers together so that they can share resources, you |
| have a computer network. Connect 2 or more networks together and you have an internet. |
NIC | Network Interface Card. A board that provides network communication capabilities to and |
| from a computer system. Also called an adapter. |
Node | Any single computer connected to a network. |
Packet | A basic message unit for communication across a network. A packet usually includes routing |
| information, data and (sometimes) error detection information. |
PCMCIA | Personal Computer Memory Card International Association which develops standards for PC |
| cards, formerly known as PCMCIA cards. They are available in three types that are about the |
| same length and width as credit cards but range in thickness from 3.3 mm (Type I) to 5.0 mm |
| (Type II) to 10.5 mm (Type III). These cards provide many functions, including memory |
| storage and acting as landline modems and as wireless LAN. |
Personal | PCS networks in the U.S. provide narrowband digital communications in the 900 MHz band |
Communication | for paging and broadband digital communications in the 1,900 MHz band for cellular |
Systems | telephone service. In the U.S., PCS 1,900 is the same as Global System for Mobile |
| Communications (GSM) 1,900. |
Personal Digital | PDC is used only in Japan and is rapidly being replaced with CDMA to alleviate |
Communication | overcrowding of PDC bandwidth. |
Phreaking | Breaking into phone or other communication systems. Phreaking sites on the Internet are |
| popular among crackers and other criminals. |
Pirate | Someone who steals or distributes software without paying the legitimate owner for it. This |
| category of computer criminal includes several different types of illegal activities. Making |
| copies of software for others to use. Distributing pirated software over the Internet or a |
| Bulletin Board System. Receiving or downloading illegal copies of software in any form. |
Pirated | Software that has been illegally copied, or that is being used in violation of the software’s |
Software | licensing agreement. Pirated software is often distributed through pirate bulletin boards or on |
| the Internet. In the internet underground it is known as Warez. |
Plain Text | The opposite of Cipher Text, Plain Text is readable by anyone. |
POP | Post Office Protocol. This is a common protocol used for sending, receiving and delivering |
| mail messages. |
Port (H/W) | An interface on a computer for connecting peripherals or devices to the computer. A printer |
| port, for example, is an interface that is designed to have a printer connected to it. Ports can be |
| defined by specific hardware (such as a keyboard port) or through software. |
Glossary | I |