Defines very basic info about network between computer. What is Network, How computers are connected with each other, What is Internet,Difference between Network and Internet.

1. Network Basics
By
Swetha Rajendran

2. Data communications are the exchange of data between two
devices via some form of transmission medium such as a wire
cable.

3. Lets see about Network between computers

4. • Basically network is used to transfer information or data
through a protocol
• Data may be of text, number, audio, vedio or image
• Info can be sent between 2 computers or mobile or any
device therough the language of networking

5. Lets see how two computers are connected.

6. RJ45 cable is used to connect computer which is inserted into
NIC (Network interface cord) using this 2 computer/ Laptop
can communicate

7. NIC card

8. This forms a network called as ETHERNET

9. what happens if we have 2 or more computer
(say 5)

10. • One way is using NIC cards
• Other way is by using a Central networking device (switch or
hub) to connect 5 comupter or any device
• Data is sent or recieved via networking device with IP address
• IP address is how computers recogonize each other.

11. Eg. A networking device is connected 4 computer
and 1 printer
• The other 4 computer can use
the same printer at different
times to avoid connecting
each computer with seperate
printers (cost efficient)
• This forms a LAN (Local area
Network)

12. what if 2 PC need to communicate which are in
different locations

13. • Say PC 1(paris) PC 2(Russia)
• PC 1 is connected to a LAN will lead to a ISP 1(internet
service provider)
• Similarly PC 2 which is connected to a LAN will be
connected to a nearer ie ISP 2
• Thus ISP 1 and ISP 2 are connected.
• this forms WAN (wide area network)

14. Paris
Russia
ISP (Paris)
ISP (Russia)
WAN Network

15. Internet
“A global computer network providing a variety of information
and communication facilities, consisting of interconnected
networks using standardized communication protocols”

16. • This consist of sever and client
• The users are clients and the plateform we access is server
• The data can be sent and recieved by http request
protocol

17. • Basially Google, Facebook, Youtube, Amazon etc use
their public servers to store the data and (we) the users
can access the data
• Network connects thousands of PC at one-time while the
Internet connects millions of computers at one time.

18. The Network is a collection of computer
systems and devices that are linked
together using LAN, WAN, CAN, or
MAN whereas the Internet is a global
system to link various types of electric
devices worldwide.
The Internet is a global system
to link various types of electric
devices worldwide.