I understand you are interested in SDN and Networking Programmability.
I would encourage you to review the Network Programmability Developer Specialist Certification track. You can read more about this track at the following link:
Also you can read more about the Network Programmability Developer Certification (NPDEV) exam overview and exam topics of the certification exam at the following links:
You can learn more about SDN from the FREE recorded seminars and also learn about upcoming FREE "Live" Webinars you can assist here: SDN Recorded Seminars
Also you might want to check out this great blog post related to SDN: SDN: Need Encouragement Getting with the Program?
If you would like to consider an e-learning option. You can find a great option at the following link:
Finally you might want to consider purchasing the following book by Cisco Press, that could get you initiated in this track:
I hope this information is helpful for you and I wish you all the best in your certification studies.
Thanks for your answer, after my question I had bought the following materials:
- "Programming and Automating Cisco Networks: A guide to network programmability and automation in the data center, campus, and WAN"
- An Introduction to Software Defined Networking (SDN) LiveLessons (Networking Talks)
- Security for Software Defined Networks (Networking Talks)
and founded the SDN Recorded Seminars.
I'll take a look to the materials you suggested and I hope it will be enought to pass the exam.