John Harrington of The Network Sherpa comments:

Fiber types are differentiated as multimode or single mode. Single mode was always easy for me to understand but I could never quite understand what ‘multimode’ actually meant. I’m written some notes for myself on this topic that I thought I’d share. I’m sure some physicists will have an allergic reaction to my take, but I’m happy to pay that price to learn a little more.

John has everything you’ve ever wanted to know about multimode fiber in one post. Bookmark this one for future reference.

Read more at: The many ‘modes’ of multimode