Connection Less Services:-
Features of connection less TCP(Transmission Control Protocol):-
- Fast
- bit Oriented
- No EC(Error Control) & no FC(Flow control) i.e No CC(Connection Control).
- Non Reliable
- Out of Order output
- Used when the size of data<512
- Only for small size of data
- Includes only one way handshake process.
- No dedicated connection or Session is created. hence, the data will be treated independently. So, the data unit can travel through any available path Hence, the propagation delay encountered by each packet is different. So, there is out of order delivery.
- No acknowledgement is granted hence there is no error control, no flow control, no connection control Hence, it is not reliable. But these services are simple & fast So, preferred for multi-casting.
- Network layer and transport layer can operate with connection less services
.UDP(User Data-gram Protocol):-
- It is a bit oriented connection less unreliable transport layer protocol. Which provides process to process delivery of segment with out flow control, error control and connection control. Hence, it is providing best effort but not gauranteed delivery of data in out of order fashion. Hence, it is fast and preferred for multi-casting. Because the header size is fixed i.e 8 bytes.
- NOTE:-(1) The application layer can access all the services of transport layer through TCP.
- (2) If the size of data less than 512 bytes then UDP is used otherwise TCP.
Summary
- Connection less
- Bit oriented
- No Error control
- No flow control
- No connection control
- Out of order data delivery
- Fast
- Used for Multi-Casting
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