Which of the following is a way to prevent SQL injection attacks?*Encrypting network trafficInput validationImplementing a firewallInstalling antivirus software

The best way to prevent SQL injection attacks from the options provided is through Input validation.

Here's a step-by-step explanation:

1. SQL injection attacks occur when an attacker is able to insert malicious SQL statements into a query. This is often done through user inputs that are not properly sanitized.

2. Input validation is a method where you check and validate the data entered by a user before using it in your application. This can prevent SQL injection attacks because it ensures that only valid data is used in queries.

3. Encrypting network traffic, implementing a firewall, and installing antivirus software are all good security measures, but they do not directly prevent SQL injection attacks.

4. Encrypting network traffic can prevent data from being read if it is intercepted, but it does not prevent an attacker from inserting malicious SQL statements.

5. A firewall can prevent unauthorized access to a network or system, but it does not prevent SQL injection attacks from within an authorized system.

6. Antivirus software can detect and remove malicious software on a system, but it does not prevent SQL injection attacks.

Therefore, out of the options provided, input validation is the best way to prevent SQL injection attacks.