pathway over which information can be
transferred
information sent over a channel has a source
(transmitter), from which the information originates,
and destination (receiver), to which the information
is delivered
Simplex
a
Channel
channel whose direction of transmission is unchanging
Half–Duplex
Channel
a
channel in which the direction may be reversed, but the
transmission does not occur at the same time
Full–Duplex
Channel
a
channel that allows simultaneous exchange in both
directions
network devices over relatively short
distances
usually owned by an individual or corporation
an
extension of distributed data processing wherein
it provides the best of both centralized and
distributed data processing
Wide Area Network (WAN)
spans
a large physical distance (geographicallydispersed collections of LANs)
not owned by any one organization but rather exist
under collective or distributed ownership and
management