CWNA Wireless Network Administrator

Answer - A - Shared Key authentication is considered a security risk because an access point transmits unencrypted challenge text and receives the same challenge text encrypted with the WEP key.

Key Takeaway: Because the plaintext challenge and the encrypted plaintext challenge are transmitted in the clear in sequence, a hacker could easily obtain both with a protocol analyzer. These challenges can be used to yield the WEP key, which could then be used for real-time decryption of data packets on the network.