A、A. It is used in conjunction with the wildcard mask to determine the number of hosts on a network
B、B. It is used to define which parts of the IP address are allocated to host addresses and network prefixes
C、C. It is used to hide subnets from external networks by masking the subnets with NAT
D、D. It is used to differentiate a network as a classful network or a classless network
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A、containers are classified as general purpose (dry cargo) container and specific purpose container B、general purpose container (GP) is suitable for the widest varieties of cargo C、specific purpose container is suitable for the specific cargo D、bulk container， reefer container， open-top container are all general purpose containers
A、containers are classified as general purpose (dry cargo) container and specific purpose container B、general purpose container (GP) is suitable for the widest varieties of cargo C、specific purpose container is suitable for the specific cargo D、bulk container， reefer container， open-top container are all general purpose containers
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