QI: Fill in the blanks with the appropriate answers: 1) is the only OSI layer that forbids itself from adding its own header to the data during transmission. 2) is amount of data successfully...

Extracted text: QI: Fill in the blanks with the appropriate answers: 1) is the only OSI layer that forbids itself from adding its own header to the data during transmission. 2) is amount of data successfully transferred over the network in a given time. 3) The best network topology, which is widely used nowadays, is .. 4) One of the main functions of the ... . layer is to provide a routing mechanism. 5) is the length time it takes for a data packet to be sent to a destination plus the time it takes for an acknowledgment of that packet to be received back at the origin.