10. Question
A connection, at which layer, implies that every segment of data
sent is acknowledged?
57:

Transport Layer

Explanation:

It is at the Transport Layer that it is acknowledged, the delivery of every segment of data by both the sender and receiver. And through this method, it is made known to both the sender and the receiver that which data bits have been delivered, and which have not been.

i'm so sorry that's not a question and this isn't an answer