What is Java Socket Programming? tccicomputercoaching.com

What is the Basic Networking Terminology? tccicomputercoaching.com

What is Java Socket Programming? tccicomputercoaching.com

The java.net.Socket class represents a socket, and the java.net.ServerSocket class provides a mechanism for the server program to listen for clients and establish connections with them.

Java Socket programming is used for communication between the applications running on different JRE.

Java Socket programming can be connection-oriented or connection-less.

Socket and ServerSocket classes are used for connection-oriented socket programming and DatagramSocket and DatagramPacket classes are used for connection-less socket programming.

Clientside Programming:

The client in socket programming must know two information:

1. IP Address of Server, and
2. Port number.

A socket is simply an endpoint for communications between the machines. The Socket class can be used to create a socket.

public InputStream getInputStream() , public OutputStream getOutputStream(),public synchronized void close() are important methods in clientside programming.

Serverside Programming:

public Socket accept(),2) public synchronized void close() are important methods in serverside Programming.

The ServerSocket class can be used to create a server socket. This object is used to establish communication with the clients.

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What is the Basic Networking Terminology? tccicomputercoaching.com

Computers running on the Internet communicate to each other using either the Transmission Control Protocol (TCP) or the User Datagram Protocol (UDP).

The widely used networking terminologies are given below:

1) IP Address

IP address is a unique number assigned to a node of a network e.g. 192.168.0.1 . It is composed of octets that range from 0 to 255.
It is a logical address that can be changed.

2) Protocol

A protocol is a set of rules basically that is followed for communication. For example:

• TCP
• FTP
• Telnet
• SMTP
• POP etc.

3) Port Number

The port number is used to uniquely identify different applications . It acts as a communication endpoint between applications.

The port number is associated with the IP address for communication between two applications.
The TCP and UDP protocols use ports to map incoming data to a particular process running on a computer.

4) MAC Address

MAC (Media Access Control) Address is a unique identifier of NIC (Network Interface Controller). A network node can have multiple NIC but each with unique MAC.

5) TCP-UDP: Connection-oriented and connection-less protocol

In connection-oriented protocol, acknowledgement is sent by the receiver. So it is reliable but slow. The example of connection-oriented protocol is TCP.

But, in connection-less protocol, acknowledgement is not sent by the receiver. So it is not reliable but fast. The example of connection-less protocol is UDP.

6) Socket

A socket is an endpoint between two way communication.

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