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What is Localhost? |
"Localhost" refers to the local computer that a program is running on. For example, if you are running a Web browser on your computer, your computer is considered to be the "localhost." While this does not need to be specified when using a single computer, the localhost does need to be defined when running programs from multiple computers. For example, a network administrator might use his local machine to start a Web server on one system and use a remote access program on another. These programs would run from computers other than the localhost.
In the example above, the two non-local computers must be defined by their IP addresses. The local machine is defined as "localhost," which gives it an IP address of 127.0.0.1. This is considered a "loopback" address because the information sent to it is routed back to the local machine. Localhost is often used in Web scripting languages like PHP and ASP when defining what server the code should run from or where a database is located. |
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Popular terms beginning with 'L': |
What is Leaf?
What does a computer's hard disk have in common with a tall oak? While it may not look like a tree on the outside, the hard disk is organized the same way. Directories of files and folders on a hard d... continue
What is Login?
If you are ever asked to enter your username and password, you are being asked to enter your login information. A login is a combination of information that authenticates your identity. This could be ... continue
What is LAN?
LANs are typically high speed networks that connect computers, printers and other network devices together.
What is LPI?
Stands for "Lines Per Inch." LPI is used to measure the resolution of images printed in halftones. Because halftone images are printed as a series of dots, the higher the LPI number, the more dense th... continue
What is LCD?
Stands for "Liquid Crystal Display." LCDs are super-thin displays that are used in laptop computer screens and flat panel monitors. Smaller LCDs are used in handheld TVs, PDAs, and portable video game... continue
What is Latency?
This is the amount of time it takes a packet of data to move across a network connection. When a packet is being sent, there is "latent" time, when the computer that sent the packet waits for confirma... continue
What is Leaderboard?
As the average computer screen size has grown larger, the size of online advertisements as grown as well. The leaderboard ad, which was introduced in 2003, has a standard size of 728 pixels wide by 90... continue
What is Linux?
Pronounced "lihnuks," this is a Unix-based operating system created by Linus Torvalds. His reason for developing it was that he wasn't happy with the currently available options in Unix. So he did wha... continue
What is Logic Gate?
Logic gates perform basic logical functions and are the are the fundamental building blocks of digital integrated circuits. Most logic gates take an input of two binary values, and output a single val... continue
What is LDAP?
Stands for "Lightweight Directory Access Protocol." If you want to make directory information available over the Internet, this is the way to do it. LDAP is a streamlined version of an earlier directo... continue
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