User's Manual

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TCP/IP
Transmission Control Protocol/Internet Protocol. This is the name for two of the most well-known protocols
developed for the interconnection of networks. Originally a UNIX standard, TCP/IP is now supported on al-
most all platforms, and is the protocol of the Internet.
TCP
It relates to the content of the data travelling through a network — ensuring that the information sent arrives
in one piece when it reaches its destination. IP relates to the address of the end station to which data is be-
ing sent, as well as the address of the destination network.
Traffic
The movement of data packets on a network.
Universal plug and play
Universal plug and play is a system which allows compatible applications to read some of their settings from
the Router. This allows them to automatically configure some, or all, of their settings and need less user con-
figuration.
URL Filter
A URL Filter is a feature of a firewall that allows it to stop its clients form browsing inappropriate Web sites.
USB
Universal Serial Bus is a specification to establish communication between devices and a host controller
(usually personal computers).
UTP
Unshielded twisted pair is the cable used by 10BASE-T and 100BASE-Tx Ethernet networks.
VCI
VCI - Virtual Channel Identifier. The identifier in the ATM (Asynchronous Transfer Mode) cell header that
identifies to which virtual channel the cell belongs.
VPI
VPI - Virtual Path Identifier. The field in the ATM (Asynchronous Transfer Mode) cell header that identifies to
which VP (Virtual Path) the cell belongs.
WAN
Wide Area Network. A network that connects computers located in geographically separate areas (for exam-
ple, different buildings, cities, or countries). The Internet is an example of a wide area network.