Q1: Acknowledgments, sequencing, and flow control are characteristics of which OSI layer?

A Layer 4

B Layer 2

C Layer 7

D Layer 3

ANS:C - Layer 4

A reliable Transport layer connection uses acknowledgments to make sure all data is transmitted and received reliably. A reliable connection is defined by a virtual circuit that uses acknowledgments, sequencing, and flow control, which are characteristics of the Transport layer (layer 4).

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