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UDP (User Datagram Protocol)
UDP is a connectionless protocol that, like TCP, runs on top of IP networks. Unlike TCP/IP, UDP/IP provides very
few error recovery services, offering instead a direct way to send and receive datagrams over an IP network. It's
used primarily for broadcasting messages over a network.
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U Interface
U Interface is a 2-wire ISDN local loop of twisted-pair cables.
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Unzip
Unzip means to extract (take out files) a Zip archive.
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Upload
Upload means to transfer files from a computer to another computer or server. Opposite of download.
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URL (Uniform Resource Locator)
URL is a string that supplies the Internet address of a Web site or resource on the World Wide Web, along with
the protocol by which the site or resource is accessed. The most common URL type is "http," which gives
the Internet address of a Web page. Some other URL types are "gopher," which gives the Internet address
of a Gopher directory, and "ftp," which gives the network location of an FTP (File Transfer Protocol)
resource.
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USB (Universal Serial Bus)
1. USB (Universal Serial Bus) is a serial 4-wire bus architecture for peripheral I/O ports that auto-senses up
to 127 peripherals at a distance of 5 meters (16.4 ft.). Version 1.1 supports 1.5- and 12-Mbps data rates. Version
2.0 is backward compatible to Version 1.1 speeds and also supports 480-Mbps data rates.
2. USB Port is a hardware interface for low-speed peripherals such as the keyboard, mouse, joystick, scanner, printer,
and telephony devices.
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UUencode
UUencoding is converting 8-bit data to 7-bit data. Many file formats are 8-bit (also called binary) which means
that the basic unit of information - a byte - comprises 8 on/off signals. Email, however, is a 7-bit (or text)
medium, preventing the transfer of 8-bit data. UUencoding compensates for this restriction by converting 8-bit
data to 7-bit data. UUencode accomplishes this by joining all of the file's bits together into a single stream,
and then dividing the stream into 7-bit chunks. The data are then emailed and received by someone who must UUdecode
it.
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