Question

IEEE 802.15.4 uses which of the following for accessing the channel? a. CSMA b. CSMA-CD c. CSMA-CA d. None of the above

Answer 1

Answer:

C. CSMA-CA

Explanation:

Carrier-sense multiple access with collision avoidance (CSMA/CA) in computer networking, is a network multiple access method in which carrier sensing is used, but nodes attempt to avoid collisions by beginning transmission only after the channel is sensed to be "idle".[1][2] When they do transmit, nodes transmit their packet data in its entirety.

Answer 2

Answer: (C) CSMA-CA

Explanation:

 The IEEE 802.15.4 is the networking standard which used to access the channel known as CSMA-CA ( Carrier sense multiple access - Collision avoidance). It majorly focus on the low cost and the low speed communication between the networking devices.

The CSMA-CA is basically used for the transmission of the data frame during the period of contention access. The IEEE 802.15.4 is the type of standard that technically define the operation of the low rate WPAN (Wireless personal are network).