LAN. WAN, MAN

1. SUNAWAR KHAN
MS(CS)
IIUI

2.  Computer networks consist of Two or more computer that are connected
together.
 Share information and resources
 Resources may include printer hard disk, scanners, application etc.
 Connected through communication media
 Guided or Un-Guided
 Network can be in the same room, building or at different places.

3.  Computer Networks are categorized according to
 How they are organized physically
 The way they were used
 The distance over which they operate
 Three Main type of Computer Network as Follows
 LAN(Local Area Network)
 WAN(Wide Area Network)
 MAN(Metropolitan Area Network)

4. C/N
WANLAN MAN

7. Section 1

8.  Covers Small Area
 Most Commonly Type of Network
 Nodes are Connected using Cables
 Covers Limited Area
Office
Laboratory
Building or Group of Building etc.

9. Very Fast Data Rate
Transmission Speed 10Mbps to
1000Mbps
Transmit Data in Limited Distance
Limited Number of Computer can
Attached

10.  Tree
 Bus
Special case of tree
One trunk, no branches
 Ring
 Star

11.  Advantages
 Resource Sharing
 Application Sharing
 Centralized Data
 Data Security & Management
 Internet Sharing
 Disadvantages
 Privacy Threat
 Expensive to Install
 Data Security Concerns

12. Section 2

13.  Covers Large Area
 Different Cities
 Countries
 Usually Connect Different LAN
 Connect through Telephone Lines
 Connected through Leased Lines or Satellite
 Reach Part of the world that is not possible with LAN
 Transmission rate is typically 56Kbps to 50Mbps

14.  ATMS of banks located in different cities
 NADRA office located in different cities of Pakistan.

15.  Advantages
 Communication Facility
 Remote Data Entry
 Centralized Data
 Entertainment
 Disadvantages
 Hardware, Software and Setup Cost
 Hardware and Software Management Cost
 Data Security Concerns
 Failure of Servers

16. Section 3

17.  Covers large area but Smaller than WAN
 It is usually connect two cities or towns
 Examples
 Connect different branches of a company in same city
 Connect different campuses of a college in a city
 Cable TV networks in a City.
 Mobile Cellular System
 Mostly use Fiber Optic Cable in these days.

18.  Advantages
MAN covers larger area than LAN
Provide higher data rate than LAN
 Disadvantage
More expensive than LAN
Difficult to maintain