Resources for learning some basic networking stuff?

First-year student here with an exam in a weeks time on computer communications & networks. The exam will have 2-3 questions... an example of the type of question is as follows;

Two nodes A and B are connected by a store-and-forward switch, which is situated half-way between A and B. A wants to send a packet to B. If the packet size (or packet length) is L (bits), the transmission speed (or transmission rates) and the propagation speed on all the transmission links are R (bps) and S (m/s) respectively, the distance between A and B is D (m). Assuming that the processing delay and the queuing delay of the switch are dproc (s) and dq (s) respectively. Express the total end-to-end delay for A to transmit one packet to B in terms of L, R, d, dproc and dq. Indicate the units clearly.

Additionally, there are similar questions regarding transfer speeds, time taken eg

Following on from (a), if A wants to send a file of size F bytes to B, what is the total time taken for B to receive the complete file?

I AM NOT ASKING FOR ANSWERS!

I thought this might be the right place for some not-so-nooby individuals to help me find some great learning resources so I don't fail this test. Any help appreciated Reddit, thanks.