Which of the following is a strong password practice?

Using a mix of letters, numbers, and symbols is considered a strong password practice because it significantly enhances the complexity and unpredictability of the password. This complexity makes it much harder for attackers to guess or crack the password through methods such as brute force attacks. A strong password typically includes uppercase and lowercase letters, numerals, and special characters, creating a unique combination that is harder to replicate.

In contrast, using your name and birthdate or a simple password like "password123" makes the password easily guessable since they often contain personal information or common phrases. Additionally, reusing passwords across multiple sites creates vulnerabilities, as a breach on one site could lead to unauthorized access on others if the same password is used. Strong password practices help ensure the security of personal accounts and sensitive information.