||Connection oriented Service
|In connectionless the data is transferred in one direction from source to destination without checking that destination is still there or not or if it prepared to accept the message.
||In connection oriented service we have to establish a connection before starting the communication. When connection is established we send the message or the information and then we release the connection.
|Each message is routed independently from source to destination. The order of message sent can be different from the order received.
||The order of message received is same as the order sent.
|In connection oriented service authentication is not needed
||In connection oriented service authentication is needed
|It is faster
||It is slower
|It is non-reliable
||It is reliable
|Connectionless service is message based.
||Connection oriented service interface is stream based
|Example is UDP
||Example is TCP/IP