Consider a subnet 120.128.128.0/17. Suppose an ISP owns the block of addresses of this subnet and wants to partition the address block into four (sub)subnets, with each block having the same number of IP addresses. What are the addresses (of form a.b.c.d/x) for the four (sub)subnets? Subnet 1: 120.128. .0/ Subnet 2: 120.128. .0/19. Subnet 3: 120.128. .0/19. Subnet 4: 120.128. .0/19.

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