单项选择题 You are the network administrator at TestKing. TestKing has been provided withthe network address 165.100.27.0/24. The TestKing CEO wants to know how many subnetworks this address provides, and how many hosts can be supported on each subnet. What would your reply be?（）

多项选择题 Which of the following IP hosts would be valid for PC users, assuming that a /27 network mask was used for all of the networks?（）

单项选择题 How would you express the binary number: 10101010 in its decimal and hexadecimal forms?（）