What Is Cisco Dhcp Snooping?
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Cisco DHCP Snooping is a security feature available on most Cisco switches. It acts as a guard against malicious DHCP traffic by only allowing authorized DHCP servers to respond to DHCP requests on a LAN. The switch tracks which ports are connected to trusted DHCP servers and allows only responses from those servers. Any other response is deemed as suspicious and is blocked by the switch. This prevents rogue DHCP servers from being used to assign IP addresses to unauthorized devices, which could lead to malicious activity.