Data signals are transmitted from one device to another using one or more types of
transmission media, including twisted-pair cable, coaxial cable and fibre-optic cable. A
message to be transmitted is the basic unit of network communications. A message may
consist of one or more cells, frames or packets which are the elemental units for network
communications. Networking technology includes everything from local area networks
(LANs) in a limited geographic area such as a single building, department or campus to
wide area networks (WANs) over large geographical areas that may comprise a country,
a continent or even the whole world.
transmission media, including twisted-pair cable, coaxial cable and fibre-optic cable. A
message to be transmitted is the basic unit of network communications. A message may
consist of one or more cells, frames or packets which are the elemental units for network
communications. Networking technology includes everything from local area networks
(LANs) in a limited geographic area such as a single building, department or campus to
wide area networks (WANs) over large geographical areas that may comprise a country,
a continent or even the whole world.
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