IEEE 802.1X

Updated 31 Jul 2026

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def
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  port-based Network Access Control (NAC) — a device gets no network access until it authenticates
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how it's used
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  used together with an authentication database such as RADIUS, LDAP, or TACACS+
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  key roles: the supplicant (the client), the authenticator (the device providing access), and the authentication server (which validates client credentials)
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related
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  Extensible Authentication Protocol (EAP)
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  RADIUS
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cards
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  What is 802.1X
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    Port-based Network Access Control — a device gets no network access at all until it authenticates

Linked references 5