Two tables are ____ compatible if they have the same number of columns and if their corresponding columns have identical data types and lengths.

Which of the following statements is true ofWi-Fi (802.11)?

A. ?The speed of a Wi-Fi network is independent of the Wi-Fi standard being used. B. ?Wi-Fi is designed for low-range data transfers-typically between 10 and 30 feet indoors and 30 to 90 feet outdoors. C. ?The speed of a Wi-Fi network is independent of the number of solid objects between the access point and the computer or other device being used. D. ?Wi-Fi is designed for medium-range data transfers-typically between 100 and 300 feet indoors and 300 to 900 feet outdoors.

File/directory data backup copies ________.

A. data B. registery settings C. programs and data D. programs