What statement is true of a WLAN design that supports Real-Time Location Services (RTLS) with 802.11 RFID asset tags?
A.
When passive tags are implemented, the AP density should be increased by 25% to make up for the shorter transmit range of passive tags as compared to active tags.
B.
Active RFID tags periodically transmit 802.11 beacon management frames that must be synchronized with the AP for proper location of the tagged asset.
C.
With passive tags, AP transmit gain should be increased to supply extra power for near-field coupling or backscatter modulation from the tag to the AP since the passive tag lacks an internal power source.
D.
Passive tags do not communicate directly with the WLAN infrastructure, but instead they rely on the tag reader to communicate tag information to the location server.
Passive RFID tags lack an internal power source and rely on energy transmitted from an RFID reader to power up and communicate. In WLAN designs supporting RTLS, passive tags do not directly communicate with the WLAN infrastructure. Instead, they depend on tag readers to capture their information and relay it to the location server. This design consideration is crucial for accurate asset tracking and management.
[Reference: CWDP-305 Official Study Guide, Chapter on Designing for Specific Applications, , ]
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