Computer Networking
The network layer, in reference to the OSI model, provide

All of these
data link procedures that provide for the exchange of data via frames that can be sent and received
the virtual circuit interface to packet-switched service
the interface between the X.25 network and packet mode device
None of these

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Computer Networking
What is the purpose of flow control?

To reassemble segments in the correct order at the destination device.
To provide a means for the receiver to govern the amount of data sent by the sender.
To regulate the size of each segment.
To ensure that data is retransmitted if an acknowledgment is not received.

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