单项选择题 The TestKing network was assigned the Class C network 199.166.131.0 from the ISP. If the administrator at TestKing were to subnet this class C network using the 255.255.255.224 subnet mask, how may hosts will they be able to support on each subnet?（）

单项选择题 How many subnetworks and hosts are available per subnet if you apply a /28 mask to the 210.10.2.0 class C network?（）

单项选择题 You have a Class C network, and you need ten subnets. You wish to have as many addresses available for hosts as possible. Which one of the following subnet masks should you use?（）