SonicWALL Content Security Manager 2200 Getting Started Manual page 36

router - A device that routes data between networks through IP address information in
the header of the IP packet. A router forwards packets to other routers until the packets
reach their destination. The Internet is the largest example of a routed network.
subnet - A portion of a network. Each subnet within a network shares a common network
address and is uniquely identified by a subnetwork number.
subnet mask - A 32-bit number used to separate the network and host sections of an IP
address. A subnet mask subdivides an IP network into smaller pieces. An example of a
subnet mask might be 255.255.255.248 for subnet with only eight IP addresses.
TCP/IP - Transmission Control Protocol/Internet Protocol is the basic communication
protocol of the Internet. It supports sending information in packets, and identifies each
device with a unique numeric IP address.
WAN - A Wide Area Network is a geographically distributed network composed of
multiple networks joined into a single large network. The Internet is a global WAN.
SonicWALL CSM Series Appliance Getting Started Guide Page 35