Some courses that you may be interested instead of IK2213 in P4:

IK2200 on SDN as mentioned before

IO2654 Optical networks: very relevant course today, this topic is gaining huge popularity, one reason his the high transmission rate needs for cloud computing

IK2508 Wireless Transmission Techniques: for those who would like to understand more about wireless transmission, extending the knowledge you have from the Wireless Networks course

ID2210 Distributed Computing, Peer-to-Peer and GRIDS: nice course on distributed systems, also for engineers. There are some prerequisites, but according to the teacher, you will manage this course.

ID2012 Ubiquitous computing: This is a course on sensors, I have little information, but feel free to check the webpage. Here preliminary knowledge should be checked.