(1) Your favorite ISP wishes to circulate a simple message to its subscribers, describing the difference between the two available approaches to structuring network control plane, namely the Per-router control and logically centralized control. As a student of Computer Networks, clearly describe the difference between the two aforementioned approaches and further advise on a better approach to implement. (5)

(2)Discuss why scheduling mechanisms are important in destination based forwarding?(4)

(3)Suppose your favorite ISP wanted to implement a new routing protocol in the SDN control plane. As a student of Computer Networks, at which layer would you recommend for the implementation of that protocol? Explain.(3)