Page 179 - CISSO_Prep_ Guide

Microwave - a line of sight communications technology that is
based on a microwave radio frequency signal between two
devices, used in campus area networks and long haul radio
communications.

Satellite - radio frequency communications used for long haul
communications often to areas not accessible through fiber or
conventional communications media. Requires line of sight.
Since the signal of a satellite can be picked up over a large area,
it requires the use of encryption for sensitive data.

Mobile phone/cellular technology - data and voice
communications across large areas by connecting to a 'cell'
tower. Not line of sight. Variable speeds according to protocols
and technology in use.

Network Layouts

Bus

The physical and logical structure of networks can also vary.
The oldest networks were peer-to-peer networks (for example, a
bus.) A bus is a network model where all the devices on the
network are connected to a single communications path. This
can be done using a cross-connect cable for two devices or a hub
for more devices. This was also done with some of the older
mainframe models. Each device on a bus type network is a peer
- equal. If any device wants to communicate, then it puts its data
on the bus network with an address of the intended recipient. As
the data traverses the network, it is picked up by each device on