Can you solve it? An Oxford University admissions question

Edit: Please read the article linked by Alfred before reading this article as this one has the solution and the one to which Alfred linked poses the puzzle. End_of_Edit

https://www.msn.com/en-gb/money/technol … ar-AAU8pF1

I don't know if it is the same thing but I remember back in the early 1980s when looking at linking together two microcomputers of different makes, all the ones that I saw had a section in the manual of how to do it, yet for each type of computer the instructions always assumed that that microcomputer was in charge of the two computer network.

William