TCP/IP Management Programming Manual

Glossary
HP NonStop TCP/IP Management Programming Manual—529636-001
Glossary-19
token ring LAN
token ring LAN. A ring network that allows unidirectional data transmission between data
stations, by a token passing procedure, such that the transmitted data return to the
transmitting station.
token ring ServerNet adapter. A ServerNet adapter that provides access to token ring
LANs.
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.
TRSA. See token ring ServerNet adapter.
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