Manual

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Chapter 7 - Glossary
TCP/IP Transmission Control Protocol/Internet Protocol
The basic protocols used on the Internet. TCP is
responsible for dividing data up into packets for delivery
and reassembling them at the destination, while IP is
responsible for delivering the packets from source to
destination. When TCP and IP are bundled with higher-
level applications such as HTTP, FTP, Telnet, etc., TCP/IP
refers to this whole suite of protocols.
Telnet/SSH
An interactive, character-based program used to access a
remote computer. While HTTP (the web protocol) and FTP
only allow you to download les from a remote computer,
Telnet / SSH allows you to log into and use a computer
from a remote location.
TFTP Trivial File Transfer Protocol
A protocol for le transfers, TFTP is easier to use than File
Transfer Protocol (FTP) but not as capable or secure.
Trunk
Two or more ports are combined as one virtual port, also
called as Link Aggregation.
TTL Time To Live
A eld in an IP packet that limits the life span of that packet.
Originally meant as a time duration, the TTL is usually
represented instead as a maximum hop count; each router
that receives a packet decrements this eld by one. When
the TTL reaches zero, the packet is discarded.
twisted pair
The ordinary copper telephone wiring long used by
telephone companies. It contains one or more wire pairs
twisted together to reduce inductance and noise. Each
telephone line uses one pair. In homes, it is most often
installed with two pairs. For Ethernet LANs, a higher grade
called Category 3 (CAT 3) is used for 10BASE-T networks,
and an even higher grade called Category 5 (CAT 5)
is used for 100BASE-T networks. See also 10BASE-T,
100BASE-T, Ethernet.