Ethernet gateway
server
Computer on a network that provides services to other computers on the network.
SPI (stateful packet inspection)
The ability of a firewall to remember outgoing requests to the Internet from internal network users and only allow responses to those requests back through the firewall, thus denying attempts to access the local network that have not been requested.
spread spectrum
Wideband radio frequency technique designed to trade bandwidth efficiency for reliability, integrity, and security.
SSID (Service Set ID)
A generic term for a Service Set ID.
SSL (Secure Sockets Layer)
Protocol enabling encrypted and authenticated Internet communications.
star (or spanning tree) topology
Ethernet networking in which all devices (including computers, print servers, or additional hubs) are connected through a central hub.
static IP address
Permanent IP address assigned to a node in a TCP/IP network. Network devices serving multiple users, such as servers and printers, are usually assigned static IP addresses, as compared to dynamic IP address.
subnet mask
Method for splitting IP networks into a series of subgroups, or subnets. Also known as a network mask.
switch
A network device that selects a path or circuit for sending a unit of data to its next destination. It may also serve as a router, but at its basic level is simpler and faster than a router.
T1 line
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