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7. Consider the SDN OpenFlow network shown in Question 6. Suppose we want switch s2 to function as a firewall. Specify the flow table in s2 that implements the following firewall behaviors (specify a different flow table for each of the four firewalling behaviors below) for delivery of datagrams destined to h3 and h4. You do not need to specify the forwarding behavior in s2 that forwards traffic to other routers. (15 points) a. Only traffic arriving from hl and h6 should be delivered to hosts h3 or h4 (i.e that arriving traffic from host h2 and h5 is blocked). Only TCP traffic is allowed to be delivered to hosts h3 or h4 (i.e., that UDP traffic is blocked). b. c. Only traffic destined to h3 is to be delivered (i.e., all traffic to h4 is blocked). d. Only UDP traffic from h1 and destined to h3 is to be delivered. All other traffic is blocked. 7. Consider the SDN OpenFlow network shown in Question 6. Suppose we want switch s2 to function as a firewall. Specify the flow table in s2 that implements the following firewall behaviors (specify a different flow table for each of the four firewalling behaviors below) for delivery of datagrams destined to h3 and h4. You do not need to specify the forwarding behavior in s2 that forwards traffic to other routers. (15 points) a. Only traffic arriving from hl and h6 should be delivered to hosts h3 or h4 (i.e that arriving traffic from host h2 and h5 is blocked). Only TCP traffic is allowed to be delivered to hosts h3 or h4 (i.e., that UDP traffic is blocked). b. c. Only traffic destined to h3 is to be delivered (i.e., all traffic to h4 is blocked). d. Only UDP traffic from h1 and destined to h3 is to be delivered. All other traffic is blocked