Welcome to the ZyXEL Networking Glossary - your definitive source for descriptions of networking terms and ZyXEL's product features.
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With DHCP snooping, a system obtains a client's MAC-IP address information (in the reply messages from a DHCP server). This feature prevents subscribers from assigning their own static IP addresses that may conflict with DHCP-assigned IP addresses. If DHCP snooping is part of IP Source Guard, the system also drops DHCP packets from untrusted ports and learns dynamic bindings from trusted ports.