Offering IT Services Socket Programming

Brief Description of Products in which Socket Programming is used:

A socket is a communications connection point (endpoint) that you can name and address in a network The connection that a socket provides can be connection-oriented or connectionless.

Connection-oriented communication implies that a connection is established, and a dialog between the programs will follow. The program that provides the service (the server program) establishes the connection. It assigns itself a name that identifies where to obtain that service. The client of the service (the client program) must request the service of the server program. The client does this by connecting to the distinct name that the server program has designated. It is similar to dialing a telephone number (an identifier) and making a connection with another party that is offering a service (for example, a plumber). When the receiver of the call (the server) answers the telephone, the connection is established. The plumber verifies that you have reached the correct party, and the connection remains active as long as both parties require it.

Connectionless communication implies that no connection is established over which a dialog or data transfer can take place. Instead, the server program designates a name that identifies where to reach it (much like a post office box). By sending a letter to a post office box, you cannot be absolutely sure the letter is received. You may have to send another letter to reestablish communication.

Socket Communication was preferred over other IPC methods because of the advantages::

1. The processes that use a socket can reside on the

same system or on different systems on different networks

2. Typical system configuration places the server on one machine, with the clients on other machines. The clients connect to the server, exchange information, and then disconnect.

Socket API Layer

1. Visual Basic Based Product 'CafeManager 2000' : Cyber Cafe Management Software built on the client-Server Technology uses Sockets for intercrosses communications. Developed on connection based Socket Programming.
2. Visual Café Based Version of ' CafeManager 2000' uses the VC language's capabilities for Socket communication.
3. In call Recording System Product the VB client Server architecture is same as in 'CafeManager 2000' Software, In addition to this the Interprocess communication of VB Server with VC (Data Acquisition Program) is also through Sockets.
4. In B2B Portals, communication with the partner companies by Opening the remote socket and communicating the data in XML format, and finally presenting the results that have come from the remote associate is a prime area of expertise.

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