It encapsulates with a header and a trailer to create a frame.
network data-link
The role is to transfer frames to packets
internet
network layer
What is a PDU? corruption of a frame during transmission data reassembled at the destination retransmitted packets due to lost communication a layer specific encapsulation
Data Link Layer
Packet switching breaks the original data into smaller segments per packet before transmission. This is done in the layer 4 transport layer of the OSI model.
If you mean TCP or UDP data packets, then no, they make up every data transmission on the net.
NO,IT CONVERTS them into frame
Basically Its a transmission system that sends packets of data across a link and then waits until it has received signals back from the recipient to show successful transmission of all data packets in that window (set size of a number of data packets). Any packets that don't receive a successful transmission flag are resent before the window progresses to the next set of data packets.
PACKETS
Packets