802.1x - NAC (network access control) is a network authentication protocol that opens ports for network access when an organization authenticates a user's identity and authorizes them for access to the network. This defines port security. The user's identity is determined based on their credentials or certificate, which is confirmed by the RADIUS or TACACS+ server., 802.af  - PoE, 13w, cat3, 802.ad - LACP (Link Aggregation Control Protocol), 802.d - STP (The Spanning Tree Protocol) network protocol that builds a loop-free logical topology for Ethernet networks to prevent bridge loops and the broadcast storms that result from them, 802.1q - VLAN Trunking, tagging for Ethernet frames and the accompanying procedures to be used by bridges and switches in handling such frames, 802.1w - RSTP (Rapid Spanning Tree Protocol), 802.3x - pause frame (Ethernet flow control), 802.at - PoE+, 30w, cat5, 802.11 - Wireless LAN (WLAN); specifications, such as Wi-Fi, etc.,

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