CompTIA CASP+ Practice Test

What technique is primarily used in network security to validate user input and prevent attacks?

1. Data encryption

2. Input validation

3. JWT tokens

4. Network segmentation

The correct answer is: Input validation

Input validation is a crucial security technique used to ensure that the data provided by users is both accurate and safe. By validating user input, systems can mitigate risks associated with various types of attacks, such as SQL injection, cross-site scripting (XSS), and other forms of injection attacks. The goal of input validation is to verify that input data conforms to the expected format, type, and length before processing it. This proactive approach helps prevent malicious data from being executed, thus safeguarding the integrity of applications and systems. While data encryption plays a significant role in protecting data confidentiality, it does not directly address the integrity and security of user input. JWT tokens are primarily used for securely transmitting information between parties and ensuring session management. Network segmentation, while crucial for limiting the attack surface and controlling traffic within networks, does not specifically target user input and its validation. Each of these other techniques serves valuable functions in their respective contexts, but input validation specifically focuses on securing the data being submitted by users.