Go back to CT0-101 - CompTIA Convergence+ Certification Exam

Question :-

Which of the following is a benefit of the 802.11a WLAN standard?
It is in a spectrum that is licensed worldwide and has no interference.
It is an IETF standard and is broadly supported by manufacturers.
It is out of the frequency range normally used by cordless teleph ones, microwave ovens, and other appliances.
It is backwards compatible to existing 802.11b WLAN equipment.

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