What Is The Difference Between The Connection Oriented And The Connection-less Service?

Connection oriented is in which connection is connected in between the 2 or more network.and connection less services is just like wireless applications.

These services are used for transferring of data between the two host computers.

In the connection oriented service, the two computers or end systems, who want to send data to each other, start their communication via using a handshaking system. It means that firstly the sender computer sends a control packet to the other end system, in this packet there is not any data; it's just for the establishment of connection between two computers. When the other computer sends the acknowledgement packet back to the first computer then their connection is established and after that first computer sends it data to the other end system. The purpose of sending the control packet is to tell the other system that is ready, I am sending data. So the other system accepts the data without any delay. That's why it is called connection oriented service. It is mostly used by the TCP. This service is slow because of handshaking process but it is reliable, chances of data loss are very less.

The connection-less service is without any handshaking process. If one computer wants to send the data then, it just sends the data packet to the end system. This service is used in the UDP. This type of service is fast then the connections oriented service but the data loss chances are more.