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Question 5 [15%] (1) Convert the IP addresses whose hexadecimal representation are: (1) ABC23EF7; (2) 3FDA0599; (3) C721EA07; (4) 7D5F3A2B to dotted decimal notation and to binary notation. Find the class and derive the netid and hostid of each of these addresses. (ii) A campus has been allocated the 163.120.0.0/16 class B network address space. It is necessary to support maximum 950 hosts per subnet and accommodate the maxi- mum number of subnets possible. Find the subnet mask which should be used, and the number of subnets supported by this mask. (Hint: Assume that the subnetids with all [25%) 3 [20%) [15%) Os" and all 1s" (1.e. when the subnet part of the IP address consists either of all zeros or all ones) must be excluded. This requirement is relaxed in modern networks). (111) Explain what are advantages and disadvantages of CIDR. Compare the router's operation in networks with and without CIDR (iv) Using the CIDR addressing scheme, a network within a larger network has been allocated a block of addresses which in the dotted decimal representation is 210.48.48.0/20. Determine the lowest and highest address in the block (expressed in dotted decimal notation and the total number of addresses in the network. (v) A CIDR router contains in its routing table the mask M=255.255.224.0 and the base address BA=198.57.160.0 of the corresponding attached network. A packet with the destination address P=198.57.223.148 arrives at the router. Will the router forward this packet to the attached network? Explain why. (25%)