PC1 has an IP address of XXXXXXXXXX, and PC2 has an IP address of XXXXXXXXXXWhich of the following statements is true regarding these two systems? A. If classful addressing is used, both PCs always...

PC1 has an IP address of 10.1.1.5, and PC2 has an IP address of 10.1.2.5. Which of the following statements is true regarding these two systems?

A. If classful addressing is used, both PCs always belong to the same network ID.

B. If classful addressing is used, both PCs do not belong to the same network ID.

C. If classless addressing is allowed, both PCs may be on the same network ID.

D. If classless addressing is allowed, both PCs are never on the same network ID.