HISTORY OF INTERNET

The first Internet name is "ARPANET" (Advanced Research Project Agency Network).
ARPANET was designed by American Department of Defense (DOD) in 1969.
This ARPANET is communicating between 4 systems with one computer at
California and three components at ATA.

Minimum Requirement for Internet:

• A computer system
• A modem or Telephone line
• An account with ISP
• Software

ISP means "Internet Service Provider"
It is also known as "Internet Access Protocol"(IAP)
ISP consists of username, password and Dial-up numbers.

TYPES OF INTERNET CONNECTION

1.Dial-up Internet Access:

 Dial-up connections require users to link their phone line to a computer in

order to access the Internet. It uses Public Switched Telephone Network (PSTN)
to establish a dialed connection to an ISP (Internet Service Provider) via
telephone lines.

2.Wi-Fi (Wireless Fidelity):

                 It is the standard method to connect a high speed local area network via
wireless transmission/receiver. Wi-Fi allows high speed internet connections
without the use of cables or wires. Radio frequency bands are used in place of
telephone or cable networks.

3.ISDN:

         
           ISDN (Integrated Services Digital Network) allows users to send data,
voice and video content over digital telephone lines or standard
telephone wires.

4.Leased Line:

          It is a service contract between a provide and a customer, where by the
provider agrees to deliver a symmetric telecommunications line connecting
two or more location in exchange for a monthly rent.

5.Broadband:

           In telecommunications, broadband is a wide bandwidth data transmission with
an ability to simultaneously transport multiple signals and traffic types. The medium
can be coaxial cable, optical fiber, radio or twisted pair.

6.Hotspots:

          A Hotspot is a physical location where people may obtain Internet access,
typically using Wi-Fi technology via a wireless local area network (WLAN)
using a router connected to an internet service provider.

7.Digital Subscriber Line (DSL):

         
            DSL provides a connection to the internet through the telephone network.
It can operate using a single phone link without preventing normal use of
the telephone line for phone calls.