It conforms to international standards and is supported by all major network software suppliers. A modem that allows fax as well as data transmission. FDDI Fibre Distributed Data Interface. Firewall A piece of security software that protects a network. It does this by putting a barrier between the network and the outside world, e.g. the Internet .
Frame relay An international standard for fast packet switching .
It supports speeds of up to 2 Mbps. FTP File Transfer Protocol. Gateway A non-technical term, often meaning a device on a LAN providing a connection point to an outside system such as a computer at another location. A computer on the LAN would use the gateway to access the other computer. Half duplex Information is sent one way at a time.