Subject Name : Data Communication & Computer Network.

Not : answer the question Step by step, please.

Q\ An ISP is granted a block of addresses starting with 190.100.0.0/16 (65,536 addresses). The ISP needs to distribute these addresses to three groups of customers as follows:

a. The first group has 128 customers; each needs 64 addresses.

b. The second group has 128 customers; each needs 128 addresses.

c. The third group has 64 customers; each needs 256 addresses. Design the subblocks and find out how many addresses are still available after these allocations.