The answer to question 01: Based on the Advanced Encryption Standard, WPA2 enables a stronger encryption algorithm (AES). AES is used in conjunction with the Cipher Block Chaining Message Authentication Code Protocol in Counter Mode (CCMP). WPA and WEP both employ the RC4 cypher. WPA is stronger than WEP because of a technology called the Temporal Key Integrity Protocol (TKIP), however WPA2 delivers the strongest security. The answer to question 02: This might be a simple DoS attack to deny network access, or the attacker could be attempting to intercept network traffic using an evil twin/rogue AP.