Technical data

TCP/IP
An Internet suite of protocols. See also Transmission Control Protocol and
Internet Protocol.
TELNET
An Internet protocol for remote terminal connection. TELNET allows a user at one
site to interact with remote timesharing systems at another site as if the user’s
terminal were directly connected to the remote host.
terminal access controller (TAC)
A program and hardware that connects terminals to the Internet, usually using
dialup modem connections.
terminal emulator
A program that allows a computer to emulate a terminal; a workstation thus
appearsasaterminaltothehost.
terminal server
A device that handles terminal operations for host nodes on a LAN; can be used to
connect terminal users to nodes on the same LAN and to users on nodes located
off the LAN. Offloads the terminal connection and I/O responsibilities from host
nodes, and reduces the number of direct terminal connections to each host, thus
saving substantial power, packaging, and cabling expense.
terminating packet
A packet whose destination is the local node.
TFTP
See Trivial File Transfer Protocol.
thread
(1) A request from an NFS client to the NFS server. (2) A single unit of execution
within a program.
throughput
A measure of how much data is sent, or can be sent, between two points in a
specified unit of time; often used in either of two contexts:
• Rated throughput, which refers to the bandwidth or capacity of a component.
• Real throughput, which refers to actual measured throughput.
time
A time value, usually a time interval that can be specified in any one of the
following forms:
number
A non-negative decimal number of seconds. For example, 27, 60, or
3600.
number:number
A non-negative decimal number of minutes followed by a seconds value
in the range of zero to 59, inclusive. For example, 0:27, 1:00, or
60:00.
number:number:number
A non-negative decimal number of hours followed by a minutes value in
the range of zero to 59, inclusive, followed by a seconds value in
the range of zero to 59, inclusive. For example, 0:00:27, 0:01:00,
or 1:00:00.
time to live (TTL)
A field in the IP header that indicates how long this packet should be allowed to
be forwarded to other routers before being discarded.
Glossary–45