The type of cybersecurity attack most commonly prevented with good password practices is the brute-force attack. In this type of attack, hackers attempt to gain unauthorized access by systematically trying different password combinations until they find the correct one. Implementing strong, unique passwords and using two-factor authentication significantly reduce the risk of successful brute-force attacks. Educating users about the importance of password management is crucial, as weak passwords remain a primary vulnerability in many organizations' security postures.