{"id":13824,"date":"2026-01-27T02:19:37","date_gmt":"2026-01-27T07:19:37","guid":{"rendered":"https:\/\/www.netwitness.com\/?post_type=glossary&p=13824"},"modified":"2026-01-27T05:00:12","modified_gmt":"2026-01-27T10:00:12","slug":"network-access-control","status":"publish","type":"glossary","link":"https:\/\/www.netwitness.com\/ja\/cyber-glossary\/network-access-control\/","title":{"rendered":"Network Access Control"},"content":{"rendered":"\t\t
\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t

What is Network Access Control?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Network access control<\/span>\u00a0(NAC) is the practice and technology that decides who or what can connect to your network and what\u00a0<\/span>they\u2019re<\/span>\u00a0allowed to do once connected. At its core, NAC enforces security policies so only trusted users and compliant devices gain and\u00a0<\/span>maintain<\/span> access to network resources, strengthening network security and visibility.<\/span><\/span><\/p>

Network access control (sometimes shortened to network access control (NAC) is about security policy enforcement at the edge of your network or within segments of it. A NAC solution checks each device or user that attempts to join the network and applies rules based on identity, device posture, location, and other criteria before granting access. This helps reduce exposure to unauthorized users and limits the spread of threats once inside.<\/span>\u00a0<\/span><\/p>

In practice, NAC works both before access is granted and afterward, continually validating devices and actions against company policies.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t

\n\t\t\t\t
\n\t\t\t\t\t

Synonyms<\/h2>\t\t\t\t<\/div>\n\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t