Why are strong passwords required to protect a system?

Strong passwords are essential in protecting a system primarily because they help to prevent dictionary attacks. A dictionary attack is a method used by attackers to gain unauthorized access by systematically entering every word in a predefined list (dictionary) of likely passwords. If a password is weak or easily guessable (like common words or simple variations), an attacker can breach a system relatively quickly.

A strong password typically includes a combination of uppercase and lowercase letters, numbers, and special characters, making it significantly more complex and difficult to crack through such attacks. By implementing strong passwords, users effectively create a barrier that increases the difficulty for attackers, thereby enhancing the overall security of the system.

Other options do not address the primary role of strong passwords in security. Access to more systems or alleviating pressure on the firewall are not directly related to the effectiveness of password strength in thwarting unauthorized access. Similarly, the notion that strong passwords are not required contradicts established security practices that emphasize their importance in protecting sensitive information and critical system resources.