What is the maximum number of usable IP addresses that can be supported on each LAN if the organization is using one class C address block?

The network administrator needs to address seven LANs. RIP version 1 is the only routing
protocol in use on the network and subnet 0 is not being used. What is the maximum number of
usable IP addresses that can be supported on each LAN if the organization is using one class C
address block?

The network administrator needs to address seven LANs. RIP version 1 is the only routing
protocol in use on the network and subnet 0 is not being used. What is the maximum number of
usable IP addresses that can be supported on each LAN if the organization is using one class C
address block?

A.
8

B.
6

C.
30

D.
32

E.
14

F.
16

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anon coward

anon coward

Sort of an invalid question I’d think. Class C address (/24) with no VLSM because RIPv1 in use (aka classful routing) so the only way to get 7 usable networks would be to have 7 class C addresses or switch from RIPv1 to another routing protocol (even RIPv2).

That said, if we ignore the classful part of RIPv1 the answer of 30 is valid and “the best answer of the available answers” but I still don’t agree with the question/answer combo.

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