User guide

194 WatchGuard Firebox X Edge
tooltip
A name or phrase that appears when the mouse pointer pauses over a button or
icon.
topology
A wiring configuration used for a network.
Transport Layer Security (TLS)
Based on the Secure Sockets Layer (SSL) version 3.0 protocol, TLS provides
communications privacy over the Internet.
Transport Layer Security Protocol (TLSP)
ISO 10736, draft international standard.
transposition cipher
A cipher in which the plain text remains the same but the order of the characters
is transposed.
triple-DES
An advanced form of encryption using three keys rather than one or two. It is
roughly as secure as single DES would be if it had a 112-bit key.
trust
Confidence in the honesty, integrity, or reliability of a person, company, or other
entity.
Trusted interface
The interface on the Firebox that connects to the internal network, which
should be protected to the maximum practical amount.
Trusted network
The network behind the firewall that must be protected from the security
challenge—usually, the Internet.
tunnel
An entity through which one network sends its data by way of another
network’s connections. Tunneling works by encapsulating a network protocol
within packets carried by the second network. For example, Microsoft’s PPTP
technology enables organizations to use the Internet to transmit data across a
virtual private network (VPN). It does this by embedding its own network
protocol within the TCP/IP packets carried by the Internet.
twisted-pair cable
A cable used for both network and telephone communications. Also known as
UTP (unshielded twisted pair) and 10BASE-T/100BASE-T cable.
UDP (User Datagram Protocol)
A connectionless protocol. Used less frequently for long-distance connections,
largely because it lacks TCP’s congestion control features. Used quite heavily in
local area networks for NFS.