LAN

Local Area Network. A network of devices (computers, printers, hubs) occupying a small area. Usually LANs do not span more than one building. LANs are very fast compared to WANs.

LANmodem

A LAN Modem is used to connect multiple computers to some other network (eg. ISP) over a phone line. It has the hub functionality built in.

Leased line

A dedicated communication line. User is charged a flat fee instead of being billed per minute of usage.

Line provisioning

It is the process of configuring the ISDN line by the service provider to suit user's particular needs and to assure hardware compatibility. It's due to the fact that ISDN is not completely standardized.

Link

Another name for a connection. Sometimes refers to a physical line.

Linux

A free UNIX-like operating system developed by Linus Torvalds. Linux and FreeBSD are very often used by hosting companies as their operating systems.

Login

An alias for an individual that is used for identification and authentication when accessing a computer system. Usually it is a sequence of characters and digits.

LOL

Laughing Out Loud

Lossless

A compression scheme is loseless when decompressed file is exactly the same as the original. This is needed for compressing executable programs and data files.

Lossy

A lossy compression allows for the quality of the compressed data to be diminished after decompression. It is suitable for audio, video and image compression.

LZW compression

Lempel Ziv Welch compression - a popular compression algorithm.