PC1 has an IP address of 17216125 PC2 is on a separate netwo

PC1 has an IP address of 172.16.12.5. PC2 is on a separate network subnet. Assuming there is no subnetting (that is, only classful addressing is used), which of the following addresses could PC2 use?

A. 172.16.250.5

B. 172.17.12.5

C. 172.16.0.1

D. 220.220.200.255

E. 8.255.255.0

Solution

B and E are correct. If the network bits are different, then the address is a valid choice.

A, C, and D are incorrect. A and C are not correct because both of these addresses have the same network bits in common with PC1’s address, therefore they cannot be on a separate network. D is not correct because 200.220.200.255 is indeed on a separate network, but it is a broadcast address and cannot be assigned to PC2 (all host bits are turned on in the Class C address).