TP-Link T2600G-18TSTL-SG3216 T2600G-18TSUN V1 Configuration Guide - Page 751

Configuring Network Security Figure 1-2 Network Topology of ND Detection Network Security User A Untrusted Port Trusted Port Untrusted Port Switch Gateway Internet Attacker IP Source Guard IP Source Guard is to filter the IP packets and IPv6 packets based on the IP-MAC Binding table and IPv6 MAC-Binding table. Only the packets that match the binding rules are permitted, which enhances the network security. DoS Defend The DoS (Denial of Service) defend feature provides protection against DoS attacks. DoS attacks occupy the network bandwidth maliciously by sending numerous service requests to the hosts. It results in an abnormal service or breakdown of the network. With DoS Defend feature, the switch can analyze the specific fields of the IP packets, distinguish the malicious DoS attack packets and discard them directly. Also, DoS Defend feature can limit the transmission rate of legal packets. When the number of legal packets exceeds the threshold value and may incur a breakdown of the network, the switch will discard the packets. 802.1X 802.1X protocol is a protocol for port-based Network Access Control. It is used to authenticate and control access from devices connected to the ports. If the device connected to the port is authenticated by the authentication server successfully, its request to access the LAN will be accepted; if not, its request will be denied. 802.1X authentication uses the typical client-server model which contains three device roles: client/supplicant, authenticator and authentication server. This is described in the figure below: Configuration Guide 721