Thank you so much for this. I am working through my subnetting workbook and was completely lost until I found this video. You explain it infinitely better than the "IP Addressing and Subnetting Workbook" does.
Mr. Nick, Thanks for your time and dedication. But check the sound level at which you record and/or use a shotgun microphone. Please permit me to suggest respectfully that a bit of overmodulation on your side is far better for a video -- like this one -- having an audio level that at its highest volume can barely be heard above any ambient room sounds on the viewer's side. In sum, turn up the recording volume so that you are usually and consistently peaking into and over the red. Again, thanks for your time and dedication.
What to do if a CIDR value is given alongwith the address and no extra information like: number of needed subnets and number of needed usable hosts, etc..? Please reply ASAP - exam in two days.