Differences between Connection less and connection oriented | Computer Networks

Communication can be established in two ways between two or more devices that are connection-oriented and connection-less. Network layers can offer these two different types of services to its predecessor layer for transferring data. Connection-oriented services involves the establishment and termination of the connection while connection-less services doesn’t require any connection creation and termination processes for transferring data.

BASIS OF COMPARISION	CONNECTION-ORIENTED	CONNECTION-LESS
Connection requirement	Necessary	Not Necessary
Reliability	Ensures reliability	not guaranteed
Congestion	congestion control can be easily achieved	Very Difficult to control congestion as we dont know which path it travels
Transfering mode	implemented using circuit switching and virtual circuit	implemented using packet switching
lost data retransmission	capable of being done i.e retransmission	not possible
Quality of service	Quality of service can be achieved	quality of service cant be achieved
state information	each router will be maintaining state information
each router does not have any state information
resource allocation	need to be allocated	no prior allocation of the resource is required
direction	all need to travel in same path	each packet will be routed independently
Circuit setup	circuit setup is required	no circuit setup

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