Connectionless Service

There are two method of data transmission in the data communication that takes place between the two or more active devices in the network at layer 4, which is also known as the transport layer in the network as all the data is transported here from one device to another. The two method are connection oriented service and COS or more commonly known as connectionless service. These two services both play an important part in transmitting the data between the devices in the data communication process, however, this article will deal with the connectionless service only.

As the name states, in this service no connection between the end points is made, like in the connection oriented service, which is solely based on the establishment of the connection between the two end points before data transfer could take place. Some of the common features of the connection less service is that the data packets that are being sent by the source to the destination need not be in a specific order, that is, the order in which the data packets arrive does not matter at all.

Secondly, reassembly of any broken or lost data packet during the process of data transmission must be in a proper order, otherwise the data would be altered and might become useless for the destined device or user. Thirdly, in the connectionless service no sessions are made between the two end points, hence, time is saved at this place, as in the connection oriented service, if the destination device is in a connection with another device then the source device would have to wait till the connection of that destined device is broken from the other end point and this can take up a lot of time. Fourthly, in the connectionless service there is no need for acknowledgement.