Welcome to the CSC Q&A, on our server named in honor of Ada Lovelace. Write great code! Get help and give help!
It is our choices... that show what we truly are, far more than our abilities.

Categories

+18 votes

I don't really understand what is going on in this diagram with the black dots and crossing lines. If someone could explain it in some different language than the book I would appreciate it.

asked in CSC335_Spring2019 by (1 point)

1 Answer

+10 votes
 
Best answer

The illustration is explaining switch paths based on inputs/outputs in parallel. The graph is organized into a matrix that could have anywhere from M inputs and N outputs based on the use case of it. Each of the 'dots' is a switch where an input m and output n are matched and closes this relation by noting a dot at the cross point of it.

I think that the crossbar illustration is trying to show us a lower level interpretation of how a switch handles incoming transmission and how they are sent out to their end destinations (if known). Then this idea is followed up by a 'better' way to do it used more efficient switches that can handle high memory load and more parallel connections to occur without bottle-necking.

answered by (1 point)
selected by
...