{"id":42057,"date":"2026-07-23T17:22:53","date_gmt":"2026-07-23T17:22:53","guid":{"rendered":"https:\/\/fidelissecurity.com\/?post_type=glossary&p=42057"},"modified":"2026-07-23T19:33:31","modified_gmt":"2026-07-23T19:33:31","slug":"network-access-control-nac","status":"publish","type":"glossary","link":"https:\/\/fidelissecurity.com\/es\/glossary\/network-access-control-nac\/","title":{"rendered":"NAC"},"content":{"rendered":"\t\t
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NAC Explained<\/h2> <\/div>\n

Network Access Control (NAC) is a cybersecurity solution that regulates who and what can access an organization’s network. It enforces security policies by authenticating users and devices before granting network access, ensuring that only authorized and compliant endpoints can connect to enterprise resources. By continuously monitoring connected devices and enforcing access controls, NAC helps reduce the risk of unauthorized access, malware infections, insider threats, and lateral movement within the network.<\/p><\/div> <\/div>\n <\/div>\n\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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As organizations adopt hybrid work models, cloud applications, Internet of Things (IoT) devices, and bring-your-own-device (BYOD) policies, the number and diversity of endpoints connecting to corporate networks continue to grow. Traditional perimeter-based security<\/a> models are no longer sufficient to protect modern environments. NAC provides an essential layer of defense by verifying identities, assessing device health, and limiting access based on predefined security policies.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Why Is Network Access Control Important?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Every device that connects to a network represents a potential entry point for attackers. Unmanaged laptops, compromised endpoints, rogue devices, and unauthorized users can introduce malware<\/a>, exploit vulnerabilities, or gain access to sensitive systems.<\/p>

Network Access Control minimizes these risks by ensuring that every connection request is verified before access is granted. It checks user credentials, device identity, operating system status, antivirus protection, security patches, and other compliance requirements. Devices that fail security checks can be denied access, quarantined, or granted limited network connectivity until they meet organizational policies. By controlling network access at the point of entry, NAC helps organizations maintain a stronger security posture while supporting secure remote work and dynamic enterprise environments.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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How Network Access Control Works<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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A NAC solution typically follows several key steps before allowing a user or device onto the network:<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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