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Ethernet is a data link layer protocol - layer 2
PDU (protocol data units) -Yuriy-
Protocol Data Unit (PDU)
TCP protocol insures that your data was delivered in reliable and rapid way.
PACKETS
frame
Data link layer of the OSI model..
A PDU (Protocol Data Unit) is defined by which layer it is in. In the physical layer and network layer, it is synonymous with the packet, in the data link layer, it is the frame. In the transport layer, it is a datagram for UDP. A datagram holds one or more PDU's, as it is the basic unit of transferring information via packet switching.
Packets
The protocol adaptation layer servers as a translator between two protocols. This technology is used in digital wireless data transmission systems.
internet
transport protocol control the transportation of data and choose the best way for transmit ion.