Assume a simple network with three nodes: A$,$ B and C$.$ A is connected to B$,$ B is connected to C and C is connected to A$.$ Node A has to transfer $800$ GB of data to node B and node B has to send $1$ TB of data to node A $[$B$-$ bytes, b$-$bits, K$-$Kilo $(1000),$ M$-$Mega $(1000$K$),$ G$-$Giga $(1000$ M$)].$

Assume that the network between node A and node B is on fiber $($separate channels for transmit and receive$)$ and it has a full duplex communication capability where node A can communicate with node B at an effective bandwidth $($after removing bandwidth utilization for overhead processing$)$ of $0\mathrm{.}8$ Gbps and at the same time node B can communicate with node A at $0\mathrm{.}8$ Gbps$.$ How much time will be required to transfer the total data between the two nodes?

Now assume that the network between node A and node B is on copper wire with an effective bandwidth of $0\mathrm{.}8$ Gbps and the transmission can only be one way at a time with negligible time for switchover from one direction to the other direction of transmission.

What is the time required for the transmission over the copper wire if transmission of only $50$ GB is permissible towards one direction and then the transmission starts in the other direction if some data is waiting in the other direction to be transmitted. The time required for preemption and processing for change of direction is $2$ milliseconds.

What will be the total time required if the network allows only simplex mode of communication from node A to node B and node B to node C and node C to node A$.$ Node C has a processing time of $10$ microseconds for receiving and forwarding each GB of data.