Which of the following measures offers strong security?

• A. Using spread spectrum transmission in 802.11
• B. Turning off SSID broadcasting
• C. WEP
• D. None of the above

Answer: (D)

Strong security comes from robust encryption and proper authentication, not just how the signal is transmitted or whether the network name is visible. Spread-spectrum techniques used in 802.11 help reduce interference and can make casual eavesdropping more difficult, but they do not provide real confidentiality on their own. Turning off SSID broadcasting is security through obscurity; it might hide the network from casual scans, but an attacker can still discover the network and capture traffic, so it isn’t strong protection. WEP is known to be insecure due to structural flaws like short IVs and weaknesses in RC4 encryption, making it crackable with readily available tools. Because none of these measures deliver robust security, the safer choice is to use a modern standard like WPA2 or WPA3 with AES, which provides strong encryption and proper authentication.