Is there a nexus 500 ssh network protocol?

As I was taking review for a certain examination, it came to my attention to question if there really is a nexus 500 ssh network protocol since I am not very familiar with it. I am seeking some expert guide and or suggestion about nexus 500 ssh's what-about like its full overview and process involved configuring this particular protocol if there is. I hope someone would notice me.
Thank you there.
