Sorry I'm not there again. I have added a 'Circuit and Packet Switching presentation' to my Yr12 Computing folder in Google drive. Please use it for consolidation of the notes you made yourselves.
There is a Task to be done on slide 14 and a link to exam question on the last slide.
Sorry I've missed so many of your lessons. I shall also be missing Monday lesson as I have a medical appointment. Please check my Blog on that day for your work.
So sorry, guys - I'll make it up to you when I next see you!