IEEE 802.11i security standards require support for which encryption techniques?

IEEE 802.11i security standards require support for which encryption techniques?

• A. TKIP only
• B. AES only
• C. WEP only
• D. TKIP, AES, and AES-CCMP

Answer: (D)

The idea is that 802.11i strengthens Wi‑Fi security by using strong, modern encryption and ensuring devices can negotiate it. It makes AES-based CCMP (AES-CCMP) the primary cipher, providing solid protection, and it also allows TKIP as a transitional option to help older hardware still connect. WEP is not part of 802.11i because its weaknesses are well known and it’s considered insecure. So the standard supports both TKIP (for compatibility) and AES-based CCMP (the strong, modern option). The option that lists TKIP, AES, and AES-CCMP covers both the transitional and the strong AES-based methods. The idea isn’t that there are separate, competing algorithms beyond these; it’s that 802.11i requires AES-CCMP and permits TKIP for compatibility.

The idea is that 802.11i strengthens Wi‑Fi security by using strong, modern encryption and ensuring devices can negotiate it. It makes AES-based CCMP (AES-CCMP) the primary cipher, providing solid protection, and it also allows TKIP as a transitional option to help older hardware still connect. WEP is not part of 802.11i because its weaknesses are well known and it’s considered insecure.

So the standard supports both TKIP (for compatibility) and AES-based CCMP (the strong, modern option). The option that lists TKIP, AES, and AES-CCMP covers both the transitional and the strong AES-based methods. The idea isn’t that there are separate, competing algorithms beyond these; it’s that 802.11i requires AES-CCMP and permits TKIP for compatibility.