👉 What is a socket?
* A socket is an object created by the operating system to communicate with the ports in the network.
* Its is a logical construct.
👉 What is the difference between socket and ports?
* A ports is a acting like a door or window of a particular network, while a socket is a object created by the OS that communicates with the ports.
* Ports are physical construct while the sockets are logical construct.
👉 What is the types of sockets?
* TCP Sockets : Connection oriented and reliable.
* UDP Sockets : Not connection oriented and non-reliable.
👉 Explain on TCP Sockets and UDP Sockets?
* TCP Sockets are used in the reliable application Eg : Email, http
* UDP Sockets are used in non-reliable application Eg : Streaming applications
* In TCP Sockets one application is assigned to one particular socket.
* In UDP Sockets many applications are assigned to one particular socket.
👉 Explain the connection establishment process between client and server using the TCP Sockets?
* The client consists of the client socket.
* The server consists of welcome socket and the connection socket.
* The client is an active entity while the server is a passive entity.
* The client sockets initiates connection while communicating with the Welcome socket in the server.
* The Welcome server is responsible to accept the client.
* Once the client is accepted then the client socket starts communication between the connection socket in the server.
* In the meantime, the welcome socket becomes free and wait for other client processes.
👉 What is blocking in sockets?
* Blocking means no other client is able to access while a particular client got accepted.
* The other client processes has to wait until the socket becomes vacant.
* A solution for this is Multi-threaded programming.
👉 Java socket programming.
* The java.net and above supports socket programming.
* To use socket programming in java , the below should be imported.
import java.net.*
* Simple chat applications can be constructed using the socket programing.
👉 Java socket programming classes.
1. Inet Address class.
2. Socket.
3. Server Socket.
4. Datagram Socket.
5. Datagram Packet.
* The yellow colored ones belong to TCP Sockets.
* The red colored ones belong to UDP Sockets.
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