A network administrator is planning a network installation for a large organization.The design requires 100 separate subnetworks,so the company has acquired a Class B network address.What subnet mask will provide the 100 subnetworks required, if 500 usable host addresses are required per subnet?()
A、255.255.240.0
B、255.255.248.0
C、255.255.252.0
D、255.255.254.0
E、255.255.255.0
F、255.255.255.192