19216811.liveReference Manual for the ProSafe VPN Firewall 25 with 4 Gigabit LAN and Dual WAN Ports
-10
Glossary
202-10085-01, March 2005
Subnet Mask
Combined with the IP address, the IP Subnet Mask allows a device to know which other addresses are local
to it, and which must be reached through a gateway or router.
T
TCP/IP
The main internetworking protocols used in the Internet. The Internet Protocol (IP) used in conjunction with
the Transfer Control Protocol (TCP) form TCP/IP.
U
Universal Plug and Play
UPnP. A networking architecture that provides compatibility among networking technology. UPnP
compliant routers provide broadband users at home and small businesses with a seamless way to participate
in online games, videoconferencing and other peer-to-peer services.
UTP
Unshielded twisted pair is the cable used by 10BASE-T and 100BASE-Tx Ethernet networks.
W
WAN
See “Wide Area Network”
Web
Also known as World-Wide Web (WWW) or W3. An Internet client-server system to distribute information,
based upon the hypertext transfer protocol (HTTP).
WEB Proxy Server
A Web proxy server is a specialized HTTP server that allows clients access to the Internet from behind a
firewall. The proxy server listens for requests from clients within the firewall and forwards these requests to
remote Internet servers outside the firewall. The proxy server reads responses from the external servers and
then sends them to internal client clients.
WEP
Wired Equivalent Privacy is a data encryption protocol for 802.11b wireless networks. All wireless nodes
and access points on the network are configured with a 64-bit or 128-bit Shared Key for data encryption.