Motorola WT4070 T

Subnet. A subset of nodes on a network that are serviced by the same router. See Router.

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.

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.

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 progr am.

Terminal. See Wearable Terminal.

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 WT4090 Serie s

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.

Tolerance. Allowable deviation from the nominal bar or space width.

Transmission Control Protocol/Internet Protocol. See TCP/IP.

Transport Layer Security (TLS). TLS is a protocol that ensures privacy between communicating applications

and their users on the Internet. When a server and client communicate, TLS ensures that no third party may

eavesdrop or tamper with any message. TLS is the successor to the Secure Sockets Layer (SSL).

Trivial File Transfer Protocol. See TFTP.