What is the primary function of Symantec?

The primary function of Symantec encompasses a broad range of cybersecurity solutions, but it is particularly known for protecting computer networks. The focus of Symantec's offerings is to defend against various cyber threats, ensuring that systems and data remain secure from unauthorized access and malware. While the company provides tools for disk encryption, system update management, and threat analysis, these functions serve as parts of a comprehensive security approach.

Symantec's core mission is to safeguard systems from vulnerabilities and attacks, reinforcing the concept that computer network protection is crucial in the cybersecurity landscape. The emphasis on maintaining the integrity and confidentiality of data is central to its purpose. Therefore, in the context of the choices provided, the function of protecting computer networks stands as the most accurate descriptor of Symantec's primary role in cybersecurity solutions.