You are looking for some information for your school project. Which question is answered in the following passage?

It includes a seemingly random string of letters, numbers and symbols. It should never contain personal information such as your birth date, address or pet’s name. The longer your password is, the harder it is to decipher. Try for at least eight characters, including upper and lowercase letters, numbers and symbols, if allowed.

• What makes my password strong?
• What is a safe Internet access?
• How do spam filters work?
• Is it safe to use the Internet at the local library?