IEEE 802.11ac Frequency Band Support

The statement claims that IEEE 802.11ac supports only the 5 GHz frequency band. To determine the correctness, we must look at the technical specifications of the Wi-Fi standards.

IEEE 802.11ac (Wi-Fi 5) This standard was specifically designed to provide high-throughput wireless connections on the 5 GHz band. It introduces features like wider channels (up to 160 MHz), more spatial streams, and MU-MIMO, all optimized for the 5 GHz spectrum. Crucially, 802.11ac devices do not operate on the 2.4 GHz band. This is a key distinction from its predecessor, 802.11n (Wi-Fi 4), which supported both 2.4 GHz and 5 GHz bands.

Comparison with Other Standards

• 802.11a: Operates only in 5 GHz.
• 802.11b/g/n: Operate in 2.4 GHz (and n also supports 5 GHz).
• 802.11ax (Wi-Fi 6): Operates in both 2.4 GHz and 5 GHz (and later extensions include 6 GHz).
• 802.11ac: Operates only in 5 GHz.

Analysis of Comments The comments show significant confusion regarding option labeling versus factual content. Several commenters state "B. True" or argue that the answer should be False because they believe ac supports 2.4 GHz. However, one comment correctly notes: "The answer is B. True Because....ac standart for 5 ghz." Another comment states "B está correto... que opera nas frequências de 5 GHz e 2,4 GHz," which is factually incorrect; 802.11ac does not support 2.4 GHz. The majority of correct explanations affirm that 802.11ac is exclusive to 5 GHz.

Therefore, the statement "IEEE 802.11ac supports only the 5 GHz frequency band" is factually True. In the provided options, if A is "True" and B is "False", the correct selection is A. However, some commenters map "True" to B. Looking at the specific comment "likes=1 answer=A | A. True IEEE 802.11ac operates exclusively on the 5 GHz frequency band," this aligns with Option A being True. Wait, let's re-read the options carefully. Options are A. True, B. False. The statement is True. So the answer is A. But many comments say "B. True". This suggests a potential mismatch in how users interpreted the options or a typo in their answers. Let's look at the vote distribution. Most say "A" or "B" but explain it's True. One says "B is correct. it supports BOTH..." which is wrong. One says "B está correto... 5GHz and 2.4GHz" which is wrong. The consensus among knowledgeable sources is that 802.11ac is 5 GHz only. Therefore the statement is True. If Option A is True, the answer is A. If the user interface maps True to B, then B. Standard convention is A=True, B=False. Thus Answer is A. But wait, looking at the comments again: "answer=B | B está correto..." implies the commenter thinks B is the right choice for the question. And "answer=B | 802.11ac operates exclusively in the 5 GHz band" - this commenter selects B but describes the behavior of A being True? No, if the statement is True, and they select B, they might think B means True. Or they think the statement is False? "802.11ac operates exclusively in the 5 GHz band — it does not support 2.4 GHz at all." This sentence supports the statement being True. If they select B, and B is False, they are contradicting themselves.

Let's look at the first comment: "answer=A | A. True IEEE 802.11ac operates exclusively on the 5 GHz frequency band." This is consistent. A=True, Statement is True.

Another comment: "answer=B | The answer is B. True Because..." This explicitly links B to True. This suggests that in this specific exam dump or platform, Option B might be labeled "True"? No, the prompt says "Options: A. True, B. False".

If the prompt says A=True, B=False, and the statement is True, the answer MUST be A. The comments saying "B. True" are likely typos where they meant "Answer is True" but picked B, or they are confused. However, there is a strong cluster of comments claiming "B is correct" while describing 802.11ac as 5GHz only. If B is False, and they say B is correct, they are saying the statement is False. Why would they think it's false? Some say "it supports BOTH 2.4 and 5 GHz". This is a common misconception. 802.11ax (Wi-Fi 6) supports both. 802.11ac does not.

Official Huawei/H3C/CompTIA knowledge: 802.11ac is 5 GHz only. Statement is True. Answer is A.

However, I must check if there's a trick. Does 802.11ac ever support 2.4? No. It is strictly 5 GHz.

So, Expert Analysis concludes: Statement is True. Option A is True. Answer is A.

Why do so many comments say B? Perhaps the question source has swapped A and B? Or perhaps the "Suggested answer" field in the real exam is B? If the suggested answer is unknown, I rely on facts. Fact: 802.11ac = 5 GHz only. Statement: "Supports only 5 GHz". Verdict: True. Option A: True. Answer: A.

Wait, let's look at the comment: "answer=B | B está correto. IEEE 802.11ac... opera nas frequências de 5 GHz e 2,4 GHz". This commenter believes ac supports 2.4GHz. This is false.

Comment: "answer=B | 802.11ac operates exclusively in the 5 GHz band — it does not support 2.4 GHz at all." This commenter selects B. If B is False, they are saying the statement "supports only 5 GHz" is False. That contradicts their own explanation.

Most logical interpretation: The correct fact is that 802.11ac is 5 GHz only. The statement is True. Option A is True. The answer is A. The comments are messy, but the technical fact is unambiguous.