What is the process that ZigBee WPANs use for authentication and encryption? Describe how it works.

What will be an ideal response?


ZigBee WPANs use a process called symmetric key for both authentication and encryption. A symmetric key is a sequence of numbers and letters, much like a password, that must be entered by the authorized user on all devices. No automatic key distribution or key rotation is included in the standard, although these options can be implemented at the higher protocol layers. The length of the key can be 4, 6, 8, 12, 14, or 16 octets, with longer keys providing more security than shorter ones.

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Explain the function of a dynamic seal.

What will be an ideal response?

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Most paleontologists agree that birds and dinosaurs are closely related

Indicate whether the statement is true or false

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What was the first animal cloned using cells other than sperm and egg?

a. Horse c. Cow b. Sheep d. Pig

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A water-source system that gets its water from a well and does not reuse the water is:

A) A closed-loop system. B) Considered a hybrid between an open- and a closed-loop system. C) Called a quasi-closed loop because it still uses a circulating pump. D) An open-loop system.

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