单项选择题
A. Deleting unusable addresses through the creation of many subnets.
B. Combining routes to multiple networks into one supernet.
C. Reclaiming unused space by means of changing the subnet size.
D. Calculating the available host addresses in the AS.
单项选择题 Which one of the following varieties of NAT utilizes different ports to map multiple IP addresses to a single globally registered IP address?（）
单项选择题 A TestKing PC has the IP address 172.16.209.10 /22. What is the subnet of this address?（）
多项选择题 Your ISP assigned you a full class B address space. From this, you need at least 300 sub-networks that can support at least 50 hosts each. Which of the subnet masksbelow are capable of satisfying your needs?（）