Watchguard Firebox X20E Reference Manual page 75

tunnel
A technology that enables one network to send its data via 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.
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.
URL (Universal Resource Locator)
The user-friendly address that identifies the location of a Web site such as
http:// www.watchguard.com.
VPN (virtual private network)
A virtual, secured network over a public or unsecure network (such as the
Internet) where the alternative – a dedicated physical network – is either
prohibitively expensive or impossible to create. Companies with branch
offices commonly use VPNs to connect multiple locations.
WAN (wide area network)
A computer network that spans a relatively large geographical area.
Typically, a WAN consists of two or more local area networks (LANs).
WatchGuard LiveSecurity Service
Part of the WatchGuard Firebox System offering, separate from the software
and the Firebox, which keeps your defenses current. It includes the broadcast
network that transmits alerts, editorials, threat responses, and software
updates directly to your desktop; your technical support contract; and a Web
site containing information, archives, and the latest software.
Web browser
Software that interprets and displays documents formatted for the Internet or
an intranet.
Web page
A single HTML-formatted file.
Web site
A collection of Web pages located in the directory tree under a single home
page.
WebBlocker
An optional WatchGuard software module that blocks users behind the
Firebox from accessing undesirable Web sites based content type, on time of
day, and/or specific URL.
Reference Guide 71