TCP/IP Configuration and Management Manual

Glossary
TCP/IP Configuration and Management Manual—427132-004
Glossary-18
token number
token number. In DSM programmatic interfaces, the number used by a subsystem to
identify each DSM token that it defines. The token type and the token number together
form the token code.
token ring. 1)þþThe token access procedure used on a network with a sequential or ring
topology. (2) A data link level protocol designed to transfer data over ring-oriented
LANs. The token ring technique is based on the use of a particular bit pattern called a
token that circulates around the ring when all stations are idle.
token type. In DSM programmatic interfaces, the part of a DSM token code that identifies
the data type and length of the token value. The token type and the token number
together form the token code.
token value. In DSM programmatic interfaces, the value assigned to a DSM token.
Trivial File Transfer Protocol (TFTP). The Internet standard protocol for file transfer with
minimal capability and minimal overhead. TFTP depends only on the unreliable,
connectionless datagram delivery service (UDP), so it can be used on machines like
diskless workstations that keep such software in ROM and use it to bootstrap
themselves.
UDP. See User Datagram Protocol (UDP).
User Datagram Protocol (UDP). The Internet standard protocol that allows an application
program on one machine to send a datagram to an application program on another
machine. UDP uses the Internet Protocol to deliver datagrams. Conceptually, the
important difference between UDP and IP is that UDP messages include a protocol
port number, allowing the sender to distinguish among multiple destinations
(application programs) on the remote machine. In practice, UDP also includes a
checksum over the data being sent.
wait mode. In the Guardian operating system, the mode in which the called procedure waits
for the completion of an I/O operation before returning a condition code to the caller.
Compare nowait mode
.
WAN. See wide area network (WAN).
WAN manager process. The WAN manager process starts and manages the WAN
subsystem objects including the ConMgr and WANBoot processes.
WAN subsystem. See wide area network (WAN) subsystem.
Warning. In DSM interfaces, a condition encountered in performing a command or other
operation, that can be significant but does not cause the command or operation to fail.
A warning is less serious than an error. Compare error
.
well-known port. Any of a set of protocol ports preassigned for specific uses by transport
level protocols (that is, TCP and UDP). Servers follow the well-known port assignments
so clients can locate them. Examples of well-known port numbers include ports