Question 16

Hashing should be used for validation.

Technicians should use hashing to verify that files downloaded from the internet have not been modified. Hashing creates a unique digital fingerprint of the file, allowing for comparison to ensure integrity.

A) Hashing

Hashing is the correct choice because it generates a fixed-size string of characters from the original file, known as a hash value. When a file is downloaded, its hash can be calculated and compared to the original hash value provided by the source. If the two hash values match, it confirms that the file has not been altered during the download process.

B) SSL certificate

An SSL certificate is used to secure connections between the server and the client, ensuring that data transmitted over the internet is encrypted. While it helps protect data in transit, it does not verify the integrity of files after they are downloaded. Therefore, it is not suitable for validating file modifications.

C) Plug-in

A plug-in refers to a software component that adds specific capabilities to a larger software application. While plug-ins can enhance functionality, they do not provide a method for validating whether a file has been altered. Thus, this option is incorrect in the context of file validation.

D) Extensions

Extensions are typically used to modify or enhance the features of software applications or web browsers. They do not offer a mechanism for file integrity verification. As a result, this option does not fulfill the requirement for verifying the modification status of downloaded files.

Conclusion

Hashing is the definitive answer for verifying file integrity, as it provides a reliable method for detecting any modifications. Other options, such as SSL certificates, plug-ins, and extensions, do not serve the purpose of validating file authenticity, making them unsuitable for this task. Hashing stands out as the only effective solution for ensuring the integrity of downloaded files.