A computer network connects computers and other hardware together to allow sharing of resources and information. The most common shared resource today is internet connection. Computer networks include local area networks (LANs) that connect devices within a small physical area like a home or office, wide area networks (WANs) that connect devices over broad geographic areas like countries or continents, and metropolitan area networks (MANs) that are larger than LANs but smaller than WANs. The largest WAN in existence is the internet.

1. Topic: Computer Networks
By
Minakshee Dey
1st B.Ed
Section ‘A’
TGCE

2. COMPUTER NETWORKS:
 A computer network is a collection of computers
connected to each other and other hardware
interconnected by communication channels that allow
sharing of resources and information.
 The most common resource shared today is
connection to the Internet. Other shared resources
can include a printer or a file server.

3. Questions
 What is Computer Network?
 The most common resource shared today is
connection to the_____________.
 Other shared resources can include a _______or a file
server.

4. Types of Networks:
 LAN - Local Area Network
 WLAN - Wireless Local Area Network
 WAN - Wide Area Network
 MAN - Metropolitan Area Network
 CAN - Campus Area Network, Cluster Area Network,
etc.
 PAN - Personal Area Network

5.  Name the types of Computer Network.
 LAN refers to___________.
 WAN refers to__________.

6. Local Area Network:
 A Local Area Network (LAN) is a computer network
that interconnects two or more computers in a limited
area such as a home, school, computer laboratory, or
office building using network media. There is a main
computer called server and remote computers called
clients. It is useful for sharing resources like files,
printers, games or other applications.

7.  What is Local Area Network?
 Give a Example of LAN.

8. Wide Area Network:
 A Wide Area Network (WAN) is a collection of
computers and network resources connected via a
network over a broad geographic area such as a nation,
a continent, etc. through private or public network
transports such as the telephone system, leased lines
or satellites. The largest WAN in existence is the
Internet.

9.  What Wide Area Network.
 Examples of WAN.
 The largest WAN in existence is the __________.

10. Metropolitan Area Network
 A metropolitan area network (MAN) is a network that
interconnects users with computer resources in a
geographic area or region larger than that covered by
even a large local area network (LAN) but smaller than
the area covered by a wide area network (WAN).

11.  What is Metropolitan Area Network?
 Give example.
 MAN is smaller than the area covered by a
___________.

12. Comparison between LAN and
WAN
 LAN covers a small geographic area, like a home, office, or
group of buildings.
 Eg: Network in an organisation
 WAN covers a broad area like a metropolitan city , a
region, a nation, etc.
 Eg: Internet
 LAN is typically owned, controlled, and managed by a
single person or organization.
 WAN is not owned by any one organization but rather
exist under collective or distributed ownership and
management

13.  LANs have a high data transfer rate
 WANs have a lower data transfer rate as compared to LANs
 LAN has fewer data transmission errors.
 WAN has more data transmission errors as compared to
LAN
 Have a small geographical range and do not need any
leased telecommunication lines
 Have a large geographical range and need leased
telecommunication lines

14.  LAN is easier to maintain at relatively low costs
because of small geographical area.
 WAN is difficult to maintain because of its wider
geographical coverage.
 LAN can be connected to other LANs over any distance
via telephone lines and radio waves
 Computers connected to a wide-area network are often
connected through public networks, such as the
telephone system.