Which statement about subnet masks is true?
A. A "0" in the subnet mask indicates part of the network ID.
B. The last eight digits of every subnet mask must be all ones.
C. All machines on the same network have the same subnet mask.
D. The subnet mask length must be the length of the IP address minus two.
Answer: C
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Case 10-1 As you prepare to teach a class on the fundamentals of databases, you want to create a real-world example that will help define some of the key terms for this concept. You have a table called AutoRepairDetails, which includes columns labeled Make, Model, LicensePlate, RepairCost, and OwnerName. In this table, which term best describes the role that RepairCost plays in the table?
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