Exam JN0-351 topic 1 question 53 discussion

A. The device that is connected to the interface has performed a DHCPRELEASE. A DHCPRELEASE message is sent by a client to the DHCP server to release its IP address. When this happens, the entry for that device is removed from the DHCP snooping database, as there is no longer an active lease. C. The device that is connected to the interface has a static IP address. DHCP snooping works by monitoring DHCP traffic. If a device uses a static IP address instead of obtaining an IP via DHCP, no DHCP-related packets are seen on the interface, and therefore, no entry is created in the snooping database.

A,C are correct

AC is correct

When a network device releases an IP address (sends a DHCPRELEASE message). In this event, the associated mapping entry is deleted from the database.

MAC limiting: If MAC limiting is enabled on the interface, it could potentially interfere with the operation of DHCP snooping.MAC limiting restricts the number of MAC addresses that can be learned on a physical interface to prevent MAC flooding attacks1. This could inadvertently limit the number of DHCP clients that can be learned on an interface, thus preventing new entries from being added to the DHCP snooping database. Static IP address: If the device connected to the interface is configured with a static IP address, it will not go through the DHCP process and therefore will not have an entry in the DHCP snooping database1.The DHCP snooping feature relies on monitoring DHCP messages to build its database1, so devices with static IP addresses that do not send DHCP messages will not have their information added.