352-001 Question #445: Real Exam Question with Answer & Explanation

The correct answer is A: 802.11. IEEE 802.11 and 802.15.4 are the two most widely deployed data link layer standards for IoT access networks, covering higher-bandwidth Wi-Fi and low-power sensor network use cases respectively.

Question

Which two IEEE standards are commonly used at the data link layer for an access network, in an loT environment? (Choose 2)

Options

A802.11
B802.16
C802.15.4
D1901.2 NB-PLC
E802.22

Explanation

IEEE 802.11 and 802.15.4 are the two most widely deployed data link layer standards for IoT access networks, covering higher-bandwidth Wi-Fi and low-power sensor network use cases respectively.

Common mistakes.

B. IEEE 802.16 (WiMAX) targets broadband metropolitan area wireless access and is not a standard data link layer technology for IoT access networks.
D. IEEE 1901.2 NB-PLC is a narrowband power line communication standard specific to smart grid applications and is not a general-purpose IoT access layer technology.
E. IEEE 802.22 defines cognitive radio WRAN technology for rural broadband coverage and is not used as an IoT access network data link standard.

Concept tested. IEEE data link layer standards for IoT access networks

Reference. https://standards.ieee.org/ieee/802.15.4/7029/

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