A client programs software with a variable that can hold 128 bytes. An attacker injects more than 128 bytes into the variable, which causes the software to fail. Which type of attack has occurred? Social engineering Port scanning Brute force Buffer overfiow 30 Which type of attack is often used as a part of penetration testing to solicit information from employe over the telephone? Man-in-the-middle Denial-of-service Port redirection Social engineering