Developing an IP addressing scheme for the East Office

The East Office site consists of $6$ network subnets with the number of hosts as

indicated in the table below.

Subnet Number of Hosts

A $25$

B $20$

C $22$

D $28$

E $25$

F $4$

A decision has already been made to use private addressing on the internal LAN of

the East Office and your boss wants you to use a single class C address and

implement subnetting to accommodate all $6$ subnets.

$1\mathrm{.}1$ Choose an appropriate valid private IP address for the LAN.

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$1\mathrm{.}2$ Assigning a subnet mask for the LAN

$1\mathrm{.}2\mathrm{.}1$ What will the subnet mask have to be to allow enough subnet address space

for all the $6$ subnets and as much address space for host addresses as possible

$($Note: Assume zero$-$subnets cannot be used$)$

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$1\mathrm{.}2\mathrm{.}2$ What is the maximum number of hosts each subnet will be able to

accommodate?

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$1\mathrm{.}3$ How many valid subnets will this subnetting create? $($Assume the zero$-$subnet

cannot be used$)$