Internet Glossary
Unfamiliar or unclear about a term or concept related to Web hosting services or Domain registration? This glossary gives meaning to much of the commonly used vocabulary associated with Web Hosting and the Internet. Simply click on any alphabetical category to quickly find the word you're looking for.
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L2TP / Layer Two Tunneling Protocol
L2TP is an extension of the PPTP (Point-to-Point Tunneling Protocol) used by an ISP (Internet service provider) to enable the operation of a VPN (virtual private network) over the Internet.
LAN / Local Area Network
Local Area Network, which is a group of computers linked to a central computer (the "LAN server"). All the computers in the network share the software and disk storage available on the network server, thus greatly expanding the resources available to a user at any one machine. A LAN has many advantages over stand-alone PCs: software can be used by everyone on the local net without loading up disk space on individual machines, and files can be stored and saved on a large hard drive and backed up every day for safe storage. LANs can be connected to the Internet for world-wide networking, and many people using office computers today get their Internet and World Wide Web connection through their LAN.
LAN modem
A LAN Modem is used to connect multiple computers to some other network (e.g. ISP) over a phone line. It has the hub functionality built in
Layer
A conceptual region that embodies one or more functions between an upper and lower logical boundary within a hierarchy of functions. Remarks: Protocols are defined in a layered way according to the OSI Reference Model.
LDAP / Lightweight Directory Access Protocol
It is a protocol for accessing information directories, such as organizations, individuals, phone number, and addresses.
Leased Line
A communications line that is rented for private use. User is charged a flat fee instead of being billed per minute of usage
Link
A connection between two Hypertext objects, used to help people navigate on the World Wide Web.
Link density
It refers to how many sites link to a particular site. You can determine the link density of a site with a reverse link lookup. A reverse link lookup tells how many websites, other than your own, are linked to your site. To perform a reverse link lookup in Alta Vista, type the keyword link: followed by a domain name or a complete URL. It will return every Web page that has a hypertext link to a particular site, directory, or page.
Link popularity
The algorithm to analyze link popularity uses third-level linking to determine a site's popularity. In other words, the algorithm looks at what sites link to the sites that link to you.
Linkrot
That which happens to hypertext and hypermedia links when people move or remove files on Web servers without providing links to new file or server locations. Some files pointed to in URLs just disappear. A feature of bad Website maintenance, but also an inevitability of the globally distributed and dynamic system of the Net and Web
Linux
A UNIX-like operating system that was designed to provide personal computer/server users a free or very low-cost operating system comparable to traditional and usually more expensive UNIX systems. Linux was developed in 1991 for an Intel driven platform by a Finnish student named Linus Torvalds. Torvalds released Linux under the GNU GPL (Gnu Not Unix General Public License).
LINX
Stands for the London Internet Exchange, a neutral interconnection point for many British ISPS and the largest IXP (point of network interconnection) in Europe , acting as a central hub where data can be moved quickly between carriers and backbones.
List Server
A program that manages the distribution of electronic newsletters and other messages to a Mailing List's subscribers.
ListServ
A popular LIST SERVER (see also MAJORDOMO).
Local Loop
The link between a customer's telephone socket and the nearest telephone switch
Local Registry Fees
Most TLDs require initial registration fees as well as annual or bi-annual renewal fees. Prices vary from cost-free to thousands of dollars per domain depending on the TLD chosen. For example, .COM domains cost which covers the first two years. Renewal fees for .COM are annually after the first two years expire
Locally
This term refers to information stored and viewed on your machine (local). As opposed to the information stored and viewed on other machines on the internet
Login / Logout
A user validation process imposed by many computer systems before they can be used. Ending a session on a computer is called "logging out," and when a user gives the command to log out, the computer ends the connection with the user
LOL
Laughing Out Loud
Lossless
A compression scheme is lossless 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
Lurker
Someone who hovers in the background in chat rooms and newsgroups without contributing to the discussion; effectively, an electronic voyeur.
Lycos
One of the first Search Engines.
LZW compression
Lempel Ziv Welch compression - a popular compression algorithm
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