Network security is the protection of data and information from unauthorized access, use, disclosure, disruption, modification or destruction. Network security involves the control of access to network resources and the protection of data on networks from unauthorized access.

Endpoint security is a type of computer security that protects computers and other devices on a network from being attacked by malware or other malicious software. It includes antivirus software, firewalls, anti-spam filters and anti-malware software.

Firewalls are a type of computer system that controls the incoming and outgoing network traffic based on predetermined rules. They are designed to protect networks from unauthorized access from outside sources as well as provide privacy for authorized users inside the network.

NIST 800-53 is a set of standards for federal information systems in the United States. It specifies requirements for how federal agencies should categorize their information assets according to sensitivity levels and how they should protect those assets.  This set of standards are considered the basic framework of network security programs in private and public organizations. Any business can use these standards.