What are some currently developing topics in network engineering/networking?

(I understand this post might violate rule #5, if so, I apologise)

I am currently a month away from having to start writing my bachelor thesis in my Network Security program. I am honestly more interested in the network part than the security one, so I would like to write about something in this field, but I don't have a topic yet.

Due to the nature of the program our main focus was on LANs and PANs, so I don't have a lot of insight into anything wider than that, but I'm very curious.

So getting back to my question, what would you say is a currently relevant topic in networking that is worth researching for me?