Internet Server Identities

InterNIC,a quasi government body in the U.S.A registers and issues internet servers their unique ip addresses.InterNIC,also authorizes organizations in other countries to issue IP addresses.

Registering A Virtual Domain With InterNIC

? Log out an interNIC server.
? Fill up a registration form online.
? pay the two-year registration fee to interNIC. This registers a virtual domain with interNIC.
Establishing Connectivity On The Internet

                The protocol used to setup communications between a client and server on the internet is TCP/IP. The network can be a heterogeneous mix of any of the following networking technologies ethernet,vsat,fiber optics,infrared,VHF/UHF radio frequencies and so on, TCP/IP will work across all quite transparently.TCP/IP breaks up data into datagrams and guarantees that the data is correctly received at its destination.

Client IP Address
How Client IP Addresses Are Assigned

? Computers that only read information offered,need not necessarily have a permanent IP address.
? When logged into the internet,a client requires a unique IP address.This IP address enables the internet server called to reply accurately.
? The Internet service provider's(ISP'S) server via which the client connects to the Internet,temporarily assigns a unique IP address to the client.
? In India,for a very long time,the only ISP was Videsh Samachar Nigam Limited.(i.e. VSNL). whenever a client logs into the internet via a VSNL server temporarily assigns a unique IP address to the computer that successfully logs in.
 How ISP's Achieve The Task Of Assigning IP Addresses
                    ISP's purchase a block of unique IP Addresses from internationally recognized networking bodies. whenever a client logs into the internet via an ISP's server, one of these unique IP addresses is temporarily assigned to the computer.


Getting A Temporary IP Address
? The Client computer logs into the ISP's server using a dial-up line and a modem.
? After a successful login is accomplished,the ISP's server automatically passes one IP address from the block of IP addresses purchased,to the computer logged in.
? Other computer on the internet that is address can setup communications with it.
 How IP Addressing Came Into Existence
The contents of the Hosts file is as follows:
IP address Domain name
202.100.17.33 Microsoft

Resolving Domain Names
? When any Client wishes to communicate with any internet server using browser software,the Client sends out a broadcast using the server's Domain name as the identifier.
? The ISP's internet server will route this broadcast to an InterNIC Root server
? The ISP's server will now pass this IP address back to the Client's browser
? Web server software running on the Internet server takes care of connecting a Client to the virtual domain as required.