Module 7 Cs 6250 Study Guide Questions And Correct Answers

Why separate the control from the data plane? {Ans: Independent evolution and development - prior to their separation, any changes to the control plane had to be met with upgrades to the hardware. Control from high-level software programs - software computes the forwarding tables in SDN, allowing us to use high-order or more abstract programming languages to implement routing algorithms. This also makes debugging and checking the behavior of the network easier.}What is the difference between a traditional and SDN approach in terms of coupling of control and data plane? {Ans: In the traditional approach, the control and data planes are closely coupled. The router runs routing algorithms and generates the forwarding table. In the SDN approach, the remote controller computers and distributes forwarding tables. The controller is physically separated from the router.}Pushes that encouraged active networking {Ans: 1. Reduction in computation cost 2. Advancement in programming languages and VM technology to protect active code. 3. Advancement in code compilation}4 areas of opportunities with control data plane separation {Ans: 1. Data centers. Consider large data centers with thousands of servers and VMs. Management of such large network is not easy. SDN helps to make network management