Networks are comprised of at least … end stations, and a medium over which data can be carried.

Guided media

signals propagate in solid media: copper, fiber, coax

propagates between transmitter/receiver pairs

Connects your TV to the cable TV system

Consist of two separate insulated copper wires that twisted together

In Twisted Pair wire pairs are …

high-speed point-to-point transmission (10's-1000's Gbps)

More expensive

100 Mbps, 1 Gbps Ethernet

Glass or plastic fibers carrying light pulses, each pulse a bit

low error rate: repeaters spaced far apart, immune to electromagnetic noise

Signal carried in various "bands" in electromagnetic spectrum

No physical "wire"

Wirless radio: Broadcast, "half-duplex" (sender to receiver)

Propagation environment effects:

point-to-point; 45 Mbps

Use as line-of-sight transmission of data signals via atmosphere

Microwaves are radio waves that provide a high-speed signal transmission.

Microwave transmission offers low speed, cost-effectiveness and ease implementation

Satellite transmission is a form of microwave transmission in which a satellite acts as the relay
station