Symbol Technologies MC9000-G - Manual (Page 516)

MC9000-G Product Reference Guide for Embedded Windows® CE .NET GL-18
TFTP (Trivial File Transfer Protocol) A version of the TCP/IP FTP
(File Transfer Protocol) protocol that has no directory or
password capability. It is the protocol used for upgrading
firmware, downloading software and remote booting of
diskless devices.
Tolerance Allowable deviation from the nominal bar or space width.
Transmission Control Protocol/Internet Protocol See TCP/IP.
Trivial File Transfer Protocol See TFTP.
TSR See Terminate and Stay Resident.
UPC Universal Product Code. A relatively complex numeric
symbology. Each character consists of two bars and two
spaces, each of which is any of four widths. The standard
symbology for retail food packages in the United States.
UDP User Datagram Protocol. A protocol within the IP protocol
suite that is used in place of TCP when a reliable delivery is
not required. For example, UDP is used for real-time audio
and video traffic where lost packets are simply ignored,
because there is no time to retransmit. If UDP is used and a
reliable delivery is required, packet sequence checking and
error notification must be written into the applications.
Visible Laser Diode (VLD) A solid state device which produces visible laser light.
WAN Wide-Area Network. A radio network that supports data
communication beyond a local area. That is, information
can be sent across a city, state, or even nationwide.
Warm Boot A warm boot restarts the mobile computer by closing all
running programs. All data that is not saved to flash
memory is lost.
WEP Wired Equivalent Privacy, is specified by IEEE for encryption
and decryption of RF (wireless) communications.