Which two statements about AES-CCMP are true? (Choose two.)
A.
It is an encryption algorithm used in the 802.11i security protocol.
B.
It is defined in 802.1X.
C.
It is the encryption algorithm used in TKIP implementations.
D.
It is required in WPA.
E.
It is required in WPA2.
Advanced Encryption Standard (AES) is the cipher system used by RSN. It is the equivalent of the RC4 algorithm used by WPA. However the encryption mechanism is much more complex and does not suffer from the problems associated with WEP. AES is a block cipher, operating on blocks of data 128bits long.
CCMP is the security protocol used by AES. It is the equivalent of TKIP in WPA. CCMP computes a Message Integrity Check (MIC) using the well known, and proven, Cipher Block Chaining Message Authentication Code (CBC-MAC) method. Changing even one bit in a message produces a totally different result.
The AES-CCMP encryption algorithm used in the 802.11i (WPA2) security protocol. It uses the AES block cipher, but restricts the key length to 128 bits. AES-CCMP incorporates two sophisticated cryptographic techniques (counter mode and CBC-MAC) and adapts them to Ethernet frames to provide a robust security protocol between the mobile client and the access point.
AES itself is a very strong cipher, but counter mode makes it difficult for an eavesdropper to spot patterns, and the CBC-MAC message integrity method ensures that messages have not been tampered with.
802 wpa2
X WPA
8W2
Short for Wi-Fi Protected Access 2 – Pre-Shared Key, and also called WPA or WPA2 Personal, it is a method of securing your network using WPA2 with the use of the optional Pre-Shared Key (PSK) authentication, which was designed for home users without an enterprise authentication server.
Counter Mode with Cipher Block Chaining Message Authentication Code Protocol (CCMP)—CCMP provides Advanced Encryption Standard (AES) data encryption for WPA and WPA2. To provide message integrity, CCMP also uses the Cipher Block Chaining Message Authentication Code (CBC-MAC)
i2