CS 6250 COMPUTER NETWORKS EXAM 2 UPDATED ACTUAL QUESTIONS AND CORRECT ANSWERS

CS 6250 COMPUTER NETWORKS EXAM 2 UPDATED
ACTUAL QUESTIONS AND CORRECT ANSWERS

Question:
1. (Lesson 7) A few of the main reasons that SDN arose are: a diversity of different network equipment (eg
routers, switches, firewalls, etc.) using different protocols that made managing the network difficult, and
second a lack of a central platform to control network equipment. (T/F)
Answer:
True

Question:
2. (Lesson 7) The main idea behind SDNs is to divide tasks into smaller functions so the code is more
modular and easy to manage. (T/F)
Answer:
False

Question:
3. (Lesson 7) With SDNs the control plane and data plane have independent evolution and development.
(T/F)
Answer:
True

Question:
4. (Lesson 7) In the SDN approach, the SDN controller is physically located at each router that is present in
a network. (T/F)
Answer:
False

Question:
5. (Lesson 7) By separating the control plane and the data plane, controlling the router's behavior became
easier using higher order programs. For example, it is easier to update the router's state or control the path
selection. (T/F)
Answer:
True

Question:
6. (Lesson 7) In the SDN approach, ISPs or other third parties can take up the responsibility for computing
and distributing the router's forwarding tables. (T/F)
Answer:
True

Question:
7. (Lesson 7) Having the software implementations for SDNs controllers increasingly open and publicly
available makes it hard to control, since any person could modify the software easily. (T/F)

, Answer:
False

Question:
8. (Lesson 7) In SDN networks, the SDN controller is responsible for the forwarding of traffic. (T/F)
Answer:
False

Question:
9. (Lesson 7) The network-control applications are programs that manage the underlying network with the
help of the SDN controller. (T/F)
Answer:
True

Question:
10. (Lesson 7) In SDN networks forwarding rules of traffic still have to be based on IP destination and
cannot be based on other metrics, packet header info etc. (T/F)
Answer:
False

Question:
11. (Lesson 7) SDN-controlled switches operate on the: (Data Plane or Control Plane?)
Answer:
Data Plane

Question:
12. (Lesson 7) In an SDN Architecture, the northbound interface keeps track of information about the state
of the hosts, links, switches and other controlled elements in the network, as well as copies of the flow
tables of the switches. (T/F)
Answer:
False

Question:
13. (Lesson 7) In SDN networks, the southbound interface is responsible for the communication between
SDN controller and the controlled devices. (T/F)
Answer:
True

Question:
14. (Lesson 7) In SDN networks, the controller needs to be implemented over a centralized server. (T/F)
Answer:
False

Question:
15. (Lesson 8) An OpenFlow switch can function as a router. (T/F)
Answer:
True