Computer network definition different types of Computer network

1. Claire Alcober & Sarah Jean Santos
BSN-2A
COMPUTER NETWORK

3. COMPUTER REPAIR & SUPPORT
COMPUTER NETWORK
an interconnection of various computer systems
located at different places
Two or more computers are linked together with a
medium and data communication devices for the
purpose of communicating data and sharing
resources

4. COMPUTER REPAIR & SUPPORT
The computer that provides resources to other
computers on a network
SERVER
Individual computers in the network, which access
shared network resources
(any device on a network)
NODES

5. COMPUTER REPAIR & SUPPORT
A computer that stores and manages files for
multiple users on a network
FILE SERVER
A computer dedicated to responding to requests
(from the browser client) for web pages
WEB SERVER

6. Computer networks have opened up an entire
frontier in the world of computing called the
client/server model

7. TYPES OF NETWORK

8. COMPUTER REPAIR & SUPPORT
LOCAL AREA NETWORK
(LAN)
PERSONAL AREA
NETWORK (PAN)
METROPOLITAN AREA
NETWORK (MAN)
WIDE AREA NETWORK
(WAN)

9. COMPUTER REPAIR & SUPPORT
LOCAL AREA NETWORK (LAN)
Networks used to interconnect computers in a single room,
rooms within a building or buildings on one site
It transmits data with a speed of several megabits per second
The transmission medium is normally coaxial cables
It links computers, in the same area for the purpose of sharing
information

10. COMPUTER REPAIR & SUPPORT
LOCAL AREA NETWORK (LAN)
Usually LAN links computers within a limited geographical area
because they must be connected by a cable, which is quite
expensive
People working in LAN get more capabilities in data
processing, work processing and other information exchange
compared to stand-alone computers
Old: BNC connector for coaxial cable New: RJ45 for twisted pair cable

11. CHARACTERISTICS
every computer
has the potential
to communicate
with any other
computers of the
network
high degree of
connection
between
computers
easy physical
connection of
computers in a
network
inexpensive
medium of data
transmission

12. COMPUTER REPAIR & SUPPORT
USES
File transfers and Access
Word and text processing
Electronic message handling
Remote database access
Personal computing
Digital voice transmission and storage

13. COMPUTER REPAIR & SUPPORT
WIDE AREA NETWORK (WAN)
Internet
It is used to describe a computer network spanning a regional,
national or global area
The transmission medium used are normally telephone lines,
microwaves and satellite links
one of the biggest WAN in the world

14. ADVANTAGES
Communication Facility
For a big company
spanning over the
country the
employees can save
long distance phone
calls and it overcomes
the time lag in
Overseas
communications.
Computer Conferencing
where users communicate
with each other through
their computer system

15. CHARACTERISTICS
Remote Data Entry
It means sitting at any
location you can
enter data, update
data and query other
information of any
computer attached
to the WAN
Centralized Information
This means if the
organization is spread over
many cities, they keep their
important business data in a
single place. WAN permits
collection of this data from
different sites and save at a
single site

16. COMPUTER REPAIR & SUPPORT
Mobile Broadband
Last mile
Private network
Examples Of Wide Area Network

17. DIFFERENCE
L
A
N
W
A
N
Restricted to limited geographical
area of few kilometers
The computer terminals and
peripheral devices are connected
with wires and coaxial cables
Cost of data transmission is less
because the transmission medium
is owned by a single organization
The speed of data transmission is
much higher
Few data transmission errors
occur
Covers great distance and
operate nationwide or even
worldwide
There is no physical connection.
Communication is done through
telephone lines and satellite links.
Cost of data transmission is very
high because the transmission
medium used are hired, either
telephone lines or satellite links

18. COMPUTER REPAIR & SUPPORT
PERSONAL AREA NETWORK (PAN)
A network arranged within an individual person, typically
within a range of 10 meters
Thomas Zimmerman was the first research scientist to bring
this idea
Personal computer devices that are used to develop the
personal area network are the laptop, mobile phones, media
player and play stations.

19. COMPUTER REPAIR & SUPPORT
TYPES OF PERSONAL AREA
NETWORK
Wired Personal Area Network
Wireless Personal Area Network
• created by using the USB.
• developed by using wireless technologies such
as WiFi, Bluetooth, hotspot

20. COMPUTER REPAIR & SUPPORT
METROPOLITAN AREA NETWORK (MAN)
A network that covers a larger geographic area by
interconnecting a different LAN to form a larger
network
Government agencies use MAN to connect to the
citizens and private industries
It has a higher range than Local Area Network(LAN).

21. COMPUTER REPAIR & SUPPORT
USES
It can also be used for communication in the militaryUsed in communication between the banks in a city
It can be used in an Airline Reservation It can be used in a college within a city

22. COMPUTER REPAIR & SUPPORT
INTERNETWORK
is defined as two or more computer network
LANs or WAN or computer network segments
are connected using devices, and they are
configured by a local addressing scheme. This
process is known as internetworking.

23. COMPUTER REPAIR & SUPPORT
Extranet
A communication network based on the internet protocol
such as Transmission Control protocol and internet protocol.
It is used for information sharing.
The access to the extranet is restricted to only those users
who have login credentials.
An extranet is the lowest level of internetworking.
It can be categorized as MAN, WAN or other computer
networks.

24. COMPUTER REPAIR & SUPPORT
Intranet
An intranet provides the facility to work in groups and for
teleconferences.
A private network based on the internet protocol such as
transmission control protocol and internet protocol.
An intranet belongs to an organization which is only accessible
by the organization's employee or members.
The main aim of the intranet is to share the information and
resources among the organization employees.

25. Thank You