but the transport layer performs a sequence check on the data and ensures that if a 12MB file is sent, the full 12MB is received. "OSI transport services" include layers 1 through 4, collectively ...

See physical layer and OSI model. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

The Message Transfer Part (MTP) Level is known as the signaling data link. It is equivalent to the OSI model Physical Layer (Layer 1). Figure 2.1 displays the physical, electrical, and functional ...