Types of network:
A net work may be classified according to area where it is connected as local area network or wide are network
i. Local area network: (LAN)
v It covers small geographical area, signal room , Building, computers (set of buildings)
v When computer and terminals are located close by it is described as (LAN)
v Distance between two computers:
10m- 1km
v Data Transfer rate.
10 – 1000 Mbps.
ii. Metro politan area network (MAN)
v Covering a metropolitan area.
-City
v Distance between two computers:
-10km
iii. Wide area net work : (WAN)
Wan network are the networks where the computers and terminals are connected of separate sites, cities countries.
v Covers a large geographical area.
Eg: country, continent.
v Distance between two computers:
100- 1000km
v Data Transfer rate.
<100 mbps
1) What are the advantages and disadvantages of net works?
v Advantages
· Net works are the sharing of resources.
§ Hardware resources can be shared
§ Software resources can be shared
§ Common databases can be shared
· For human communication, we can use the computer network.
· More effective communication between computer systems
· More security for data trough passed ward system
· Electronic mail.
· Voice communication.
· Video conferencing.
· Live broad cast (video,audio)
v Disadvantages :
· Security issues.
· Spread of viruses.
