Another reminder: Presenting the answers and/or just the tables only will earn you 0 point. You need to show all the details/work for all questions including the assumptions made. [Note: Answer these questions like you are teaching this to undergraduate students.]

4. IP Addresses and Subnets (10 pt. 5 bonus pt) (show all the details/work) a. What is the 32-bit binary equivalent of the IP address 223.1.3.28 pt) b. Consider a subnet with prefix 128.119.40.128/26. Give an example of one IP address (of form xxx.xxx.xxx.xxx or a.b.c.d) that can be assigned to this network (must show all the details/work include all assumptions). (1 pt) c. Consider a router that interconnects three subnets: Subnet 1, Subnet 2, and Subnet 3. Suppose all of the interfaces in each of these three subnets are required to have the prefix 223.1.17/24. Also suppose that Subnet 1 is required to support at least 60 interfaces, Subnet 2 is to support at least 90 interfaces, and Subnet 3 is to support at least 12 interfaces. Provide three network addresses (of the form a.b.c.d/x) that satisfy these constraints. (8 pt) (show all the details/work - include all assumptions) d. Suppose an ISP owns the block of addresses of the form 130.64.128.0/21. The ISP wants to divide its address block into four equal-sized contiguous address blocks and give one of these address blocks out to each of up to four organizations (A, B, C, and D) that are supported by this ISP (i) Provide four network addresses (of the form a.b.c.d to w.x.y.z) for organization A, B, C, and D (ii) Provide four network addresses (of the form a.b.c.d/x) for organization A, B, C, and D. show all the details/work - include all assumptions) 6 bonus points-2.5 each)