Exam 5: Wireless Personal Area Networks

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Which of the following is true about the ZigBee standard?

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A

Which of the following is true about the OSI model and IEEE 802?

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B

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

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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.

MATCHING -a simple method of phase shift keying that uses eight degrees of phase to encode tribits

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MATCHING -a security service available in 802.15.4 and used by the receiving device

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In a ZigBee tree topology, if a child loses it connection with its FFD, it becomes a(n) _____________.

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Describe the two types of physical links between Bluetooth devices.

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MATCHING -a code composed of a subset of the data, the length of the data, and the symmetric key

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Which feature of Bluetooth version 1.2 allows Bluetooth networks to coexist with 802.11 networks with a minimum of interference?

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What feature of Bluetooth version 3.0 uses a separate radio module that transmits using the same methods as IEEE 802.11?

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Which type of ZigBee device controls the network in a star topology?

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List three of the seven tasks the 802.15.4 MAC layer is responsible for.

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MATCHING -a packet-switched link that is used for data transmissions

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What is created when a Bluetooth network has one master and at least one slave using the same channel?

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Describe the WirelessHART technology.

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Which Bluetooth power class allows transmission ranges up to 330 feet?

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How is power management implemented in a ZigBee network?

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MATCHING -a process that enables a device to discover which devices are in range

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In Bluetooth Encryption Mode ______, all traffic is encrypted.

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What is a cluster tree topology and how do they compare to mesh networks?

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