Answer:
The transport layer
Explanation: Layer 4, is the transport layer of the Open System Interconnection (OSI), that handles message transfer of data between end systems or hosts and ensures complete packets transfer.
The menu command that you would <span>select to make a copy of an open file and rename it is SaveAs. </span>
Answer:
an information key that explains how information in a chart is represented by colors or patterns
Explanation:
This is the information that is used to explain the data in the graph.