Symbol Technologies MC50 - Manual (Page 92)

MC50 User Guide GL-12
Subnet Mask A 32-bit number used to separate the network and host sections of
an IP address. A custom subnet mask subdivides an IP network into
smaller subsections. The mask is a binary pattern that is matched
up with the IP address to turn part of the host ID address field into
a field for subnets. Default is often 255.255.255.0.
Substrate A foundation material on which a substance or image is placed.
SVTP Symbol Virtual Terminal Program.
Symbol A scannable unit that encodes data within the conventions of a
certain symbology, usually including start/stop characters, quiet
zones, data characters and check characters.
Symbol Aspect Ratio The ratio of symbol height to symbol width.
Symbol Height The distance between the outside edges of the quiet zones of the
first row and the last row.
Symbol Length Length of symbol measured from the beginning of the quiet zone
(margin) adjacent to the start character to the end of the quiet zone
(margin) adjacent to a stop character.
Symbology The structural rules and conventions for representing data within a
particular bar code type (e.g. UPC/EAN, Code 39, PDF417, etc.).
TCP/IP (Transmission Control Protocol/Internet Protocol) A
communications protocol used to internetwork dissimilar systems.
This standard is the protocol of the Internet and has become the
global standard for communications. TCP provides transport
functions, which ensures that the total amount of bytes sent is
received correctly at the other end. UDP is an alternate transport
that does not guarantee delivery. It is widely used for real-time
voice and video transmissions where erroneous packets are not
retransmitted. IP provides the routing mechanism. TCP/IP is a
routable protocol, which means that all messages contain not only
the address of the destination station, but the address of a
destination network. This allows TCP/IP messages to be sent to
multiple networks within an organization or around the world,
hence its use in the worldwide Internet. Every client and server in a
TCP/IP network requires an IP address, which is either permanently
assigned or dynamically assigned at startup.
Telnet A terminal emulation protocol commonly used on the Internet and
TCP/IP-based networks. It allows a user at a terminal or computer
to log onto a remote device and run a program.
Terminal See Mobile Computer.
Terminate and Stay Resident (TSR) A program under DOS that ends its foreground execution to remain
resident in memory to service hardware/software interrupts,
providing background operation. It remains in memory and may
provide services on behalf of other DOS programs.
Terminal Emulation A “terminal emulation” emulates a character-based mainframe
session on a remote non-mainframe terminal, including all display
features, commands and function keys. The MC9000 Series
supports Terminal Emulations in 3270, 5250 and VT220.
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.