Computer Networks.pptx

2. Name: Sadia Nasim
Course: TPTG620
Semester: 3rd

3. Topic: Computer Networks
Class: 10th

4. Computer Networks
A computer network is a set of computers sharing resources located on or provided by
network nodes. The computers uses common communication protocols over digital
interconnections to communicate with each other.

5. Types of Computer Networks
LAN(Local Area Network)
WAN(Wide Area Network)
PAN(Personal Area Network)
MAN(Metropolitan Area Network)

6. LAN(Local Area Network)
Local Area Network is a group of computer and peripheral devices that
are connected in a limited area such as school, laboratory, home, or
office building. The full form of LAN is Local Area Network, which is a
widely useful network for sharing resources like files, printers, games,
and other applications. The simplest type of LAN network is to connect
computers and a printer in someone's home or office. In general, LAN
will be used as one type of transmission medium.

7. Working of LAN(Local Area Network)
• One of the computers in a network can be assigned as a server, which
allows managing all other computers.
• LAN allows software to be stored on the server and which can be used by
all the users of the network.
• It helps you to connect all the workstations in a building to let them
communicate with each other locally without the need of internet access.
• Helps to share resource like printers and scanners
• Software developers can also use LAN network for sharing
development/testing tools within an office or within a factory with the help
of the client-server model of the networking system.

8. WAN(Wide Area Network)
WAN (Wide Area Network) is an important computer network that is
spread across a large geographical area. WAN network systems could
be a connection of a LAN that connects with other LAN's using
telephone lines and radio waves. It is mostly limited to an enterprise or
an organization. Wide area networks are mostly established with high-
end telecommunication circuits.

9. Application of WAN
Here, are some common applications of WAN:
• The head of the department of corporate office wants to share some data
with their regional office associates, and then they can share data by saving
it on the centralized node.
• Military operations need a highly secured network for communication.
WAN is used for this scenario.
• Railways reservation and airlines use WAN networks.
• Dean and the lecturer of the university can easily share data or resources
with each other as they share one common network.
• WAN allows workstations to be connected locally, which helps each node
to communicate with one another without having any internet connection.
• The resources like printers, scanners, hard-disk, and fax machines allow you
to share all the nodes publicly.

10. LAN WAN
LAN is a computer network that covers a small
geographic area, like a home, office, or group of
buildings.
WAN is a computer network that covers a broad area.
For example, any network whose communications
links cross-regional and metropolitan boundaries over
a long distance.
LAN has a higher data transfer rate. WAN has a lower data transfer rate as compares to
LAN.
Ownership of LAN is private. WAN's ownership can be private or public.
Its design and maintenance is easy. Its design and maintenance is difficult.

11. PAN(Personal Area Network)
PAN (Personal Area Network) is a computer network formed around a
person. It generally consists of a computer, mobile, or personal digital
assistant. PAN can be used for establishing communication among
these personal devices for connecting to a digital network and the
internet.

12. Characteristics of PAN
Below are the main characteristics of PAN:
• It is mostly personal devices network equipped within a limited area.
• Allows you to handle the interconnection of IT devices at the
surrounding of a single user.
• PAN includes mobile devices, tablet, and laptop.
• It can be wirelessly connected to the internet called WPAN.
• Appliances use for PAN: cordless mice, keyboards, and Bluetooth
systems.

13. MAN (Metropolitan Area Network)
A Metropolitan Area Network or MAN is consisting of a computer
network across an entire city, college campus, or a small region. This
type of network is large than a LAN, which is mostly limited to a single
building or site. Depending upon the type of configuration, this type of
network allows you to cover an area from several miles to tens of miles.

14. Characteristics of MAN
Here are important characteristics of the MAN network:
• It mostly covers towns and cities in a maximum 50 km range
• Mostly used medium is optical fibers, cables
• Data rates adequate for distributed computing applications.

15. Characteristics of MAN
Here are important characteristics of the MAN network:
• It mostly covers towns and cities in a maximum 50 km range
• Mostly used medium is optical fibers, cables
• Data rates adequate for distributed computing applications.

16. The End