Channel 14 in the 2.4 GHz band supports only the 802.11b protocol and is only available in Japan.

Question

Options

• ATrue
• BFalse

• A
  26% (10)
• B
  74% (28)

Explanation

Option B is correct because the statement contains a factual error regarding protocol support. While Channel 14 in the 2.4 GHz band is exclusively available in Japan (that part is accurate), it supports both 802.11b and 802.11g - not 802.11b alone. Japan's regulatory body (the MIC) originally restricted Channel 14 to 802.11b, but later extended authorization to include 802.11g as well.

Why A is wrong: Selecting "True" requires both claims to be accurate. Since the protocol restriction claim is incorrect, the full statement cannot be true - even though the Japan-only portion is factually correct.

Memory tip: Think of Channel 14 as "Japan's exclusive channel, but not protocol-exclusive." The country restriction (Japan-only) is the reliable rule to memorize; the idea that it locks out 802.11g is the trap. If you remember "14 = Japan + b/g," you won't be fooled by variations of this question.

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