This document discusses different types of computer networks. A local area network (LAN) connects computers within a small geographic area like a home, office, or building. A metropolitan area network (MAN) spans a larger area like an entire city. A wide area network (WAN) connects multiple LANs and MANs across large distances and geographic areas, such as an entire country. Personal area networks (PANs) transmit data within 10 meters, such as between wireless devices owned by an individual. Campus area networks (CANs) serve universities or large schools within 1-5 km. Home area networks (HANs) connect devices in a home. Wireless local area networks (WLANs) use radio waves to connect

1. Presented by : Sangeeta Saini
M.Com ( final)
671

2. CONTENTS

3. Computer Network
When a number of
computers are
connected with each
other in such a way
that they can share
information , the
system is called
network .

4. Group working
To share
information.
To share
computer files.
To share
computer
equipments.
To improve
communication
speed and
accuracy

5. Local area network (LAN)
• Developed in 1970s
• A LAN is a small and privately owned
network to provide local connectivity
within a small region.
• It spans from few thousand
meters to 1 km.
Limited in
geographical site
• LAN supports less users at a
time , it is around 5 to 10.Limited users

6. Example of LAN
Two or more
computers are
connected in small
office, small building,
small company and
internet café.

7. Advantages and disadvantages of
LAN
 Lower in cost.
 Sharing of expensive
resources such as laser
printers.
 High speed of
exchange of essential
information.
 High reliability.
 When number of nodes
became increase then
performance became
decrease.
 Area covered is limited.

8. Metropolitan area network (MAN)
• A MAN is a network designed to extend over an
entire city.
• The MAN range between 10 to 50 km.
• This network is larger than LAN but smaller than
WAN.
• Developed in 1980s.
• Covers wider area than LAN.
• Information can be disseminated more
widely, rapidly and significantly.Advantages
• Cost is higher than LAN.
• Data rate is slow compare to LAN.
• Difficult to manage.
Disadvantages

9. The cable television networks available in
the cities.

10. Wide area network (WAN)
• A WAN is used to transmit data and information
over large geographical distances which may
even span entire countries.
• Developed in 1960s.
• It contain multiple smaller networks ,such as
LANs and MANs.
• It covers the range 100 to 1000 km.
• Covers large geographical area .
Advantages
• Expensive
• Protection against hackers and viruses
adds more complexity and expense.
Disadvantages

11. Example of WAN
 Railway ,airlines and banking companies are
example of such network as they have a central
database that is used by all the terminals.

12. Personal area network(PAN)
• PAN is used to transmit data and information
very short distances which control by a
single person within single building.
• PAN connectivity range up to 10 meters.
• It includes wireless computer keyboard ,
wireless printers and TV remotes.
• Efficient, cost effective and convenient.
Advantages
• Shorter distance up to 10 meters only.
• Data rate is slow compare to other
network.
Disadvantages

13. Example of PAN
 Internet hotspot which contain up to 8 devices
connected with a single hotspot.

14.  CAN is larger than LAN ,but smaller than
MAN.
 It covers area of a university or large school.
 It is controlled by campus owner.
 The range of CAN is measured 1 km to 5 km.
• It can be wireless or wired
network.
• Cost effective.
Advantages
• Difficult to manage.
Disadvantages

15. Example of CAN
• Network used in university or large school.

16. Home area network (HAN)
 It operates within a small area typically a home.
 It connects home digital devices such as PCs , mobile
phones, smart watch , home security system into a
common network.
• Easy to manage.
• High security.Advantages
• If backbone network damaged
than whole network become halt.Disadvantages

18.  AWLAN is wireless local area network to
communication over short distance using radio
wave.
 Area may range from a single room to entire
campus.
• Installation is quick and easy.
• Easier to provide connectivity in
area that are difficult to lay cables.
Advantages
• When the number of computers
that use the network increases , the
data transfer rate reduced.
Disadvantages

19. Example of WLAN
WI-FI or Bluetooth

20. STORAGE AREA NETWORK (SAN)
 A SAN is a high speed network of storage
devices that also connect those storage
devices with servers.
 SAN storage devices include tape and
disks.
• A SAN is reliable and fast
data recovery solution.Advantages
• It is expensive to
implement.Disadvantages

21. SAN

22.  In short, we can say that
the dynamic world today
needs fast communication
channels to move data
frequently from one place
to another.To move data
quickly from one place
to another , the concept of
networking has been
introduced.