Failback, in clustering technology, is the action of moving resources back to a node (a computer in a cluster) that has failed. This is sometimes known as «rebalancing the workload».
Full-Duplex Ethernet is an emerging type of Ethernet that supports full-duplex communication between stations on the network.
Frame Relay is a packet-switching technology offered as a telecommunications service by telcos and long-distance carriers, used primarily for WAN links.
File and Printer Sharing is a Microsoft Windows 95 and Windows 98 networking component that allows computers running Windows 95 and Windows 98 to share folders and printers,
Fiber-Optic cabling is a glass cabling media that sends network signals using light.
Frequency-Division Multiplexing (FDM) is a signal transmission technology in which multiple signals can simultaneously be transmitted over the same line or channel.