Every layer add its relevant data, (required for various typical operations such as identify packet location, sender/ receiver addresses, App. ports, etc) along with actual data to transmit.
Where as, every activities related to Packet is typically being performed in Network Layer/ IP layer.
Chat with our AI personalities
internet
Transport layer is the fourth layer in the OSI model. Transport layer is responsible for process to process delivery of entire message. Other than that it also control connection, flow of data and error , thus will resend the packet if it get lost in between.
The data link layer is responsible for the moving of the frames from one hop to another and the delivery of packets within the same network.But when there is the need to send the packets form one network to another then the network layer comes into play and with the help of logical addess being provided by the network later as well as with the help of routers or switches the packets are being reached to the desired destination. Anand bhat(mca@kiit-870024) or IGMP
layer 3
The PDU at the Network layer is referred to as a packet. A PDU at the Data Link Layer is referred to as a frame.