1.  A network is a set of devices (often referred to
as nodes) connected by communication links. A
node can be a computer, printer, or any other
device capable of sending and/or receiving data
generated by other nodes on the network.

2.  Performance
 Mostly measured by throughput and delay
 Reliability
 The frequency of failure
 Recovery time from a failure
 Security
 Protecting data from
 Unauthorized access
 Damage

3. 1. Home Area Network (HAN)
2. Local Area Network (LAN)
3. Wide Area Network (WAN)
4. Metropolitan Area Network (MAN)

4.  A home Area Network(HAN) is a network
located in a home. HAN’s are used to connect all
of a home’s digital devices, such as
computers, peripherals, phones, gaming
devices, DVR’s and Televisions.

5.  Local Area Network(LAN) is a network in which
the nodes are located within a small geographic
area. Examples include a network in a computer
lab at school or at a fast-food restaurant.

6.  A group of computers that are separated by a
large distance and tied together
 LAN facilitates fast and efficient exchange of
information at lesser costs and higher speeds
 The two LAN’s would be described as a single
WAN
 LAN has very low error rates.

8.  A large computer network that usually spans a
city or large campus
 Interconnects a number of Local Area
Networks (LAN’s)
 Provides uplink services to wide area networks
and the Internet.