3. (40 Points) Generalized Forwarding using SDN OpenFlow. OpenFlow controller Host h6 103.0.6 Host h4 10.2.0.4 Host h5 103.05 Host h3 10.2.0.3 Host h1 10.1.0.1 Host h2 10.1.0.2 Figure 2: OpenFlow Match Plus Action Networlk (a) (20 Points) Chapter 4, Problem 19. Consider the SDN OpenFlow network shown in he above figure. Suppose that the desired forwarding behavioufor datagrams arriving at s2 is as follows: i. any datagram arriving on input port 1 from host h5 or h6 that are destined to hosts hl or h2 should be forwarded over output port 2; ii. any datagrams arriving on input port 2 from hosts hl or h2 that are destined to hosts h5 or h6 should be forwarded over output port 1; iii. any arriving datagram on input ports 1 or 2 and destined to hosts h3 or h4 should be delivered to the host specified; iv. hosts h3 and h4 should be able to send datagrams to each other Specify the flow table entries in s2 that implement this forwarding behaviour (b) (20 Points) Chapter 4, Problem 22. Consider again the SDN OpenFlow network shown in Fig.3 Suppose we want switch s2 to function as a firewall. Specify the flow table in s2 that implements the following firewall behaviours (specify a different flow table for each of the four firewalling behaviours below) for delivery of datagrams destined to h3 and h4. You do not need to specify the forwarding behaviour in s2 that forwards traffic to other routers. i. Only traffic arriving from hosts hl and h6 should be delivered to hosts h3 or h4 (i.e., that arriving traffic from hosts h2 and h5 is blocked) ii. Only TCP traffic is allowed to be delivered to hosts h3 or h4 (i.e., that UDP traffic is blocked) iii. Only traffic destined to h3 is to be delivered (i.e., all traffic to h4 is blocked) iv. Only UDP traffic from h1 and destined to h3 is to be delivered. All other traffic is blocked