What should a DHCP client broadcast when the chosen IP address is already in use?

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Multiple Choice

What should a DHCP client broadcast when the chosen IP address is already in use?

Explanation:
In DHCP, after a client receives an offered IP, it should verify that the address isn’t already in use (usually by an ARP probe). If a conflict is detected, the client informs the server by sending a DHCPDECLINE to indicate that the chosen IP is taken. The server then knows not to assign that address and will offer another one. DHCPRELEASE is used when a client willingly gives up a lease it currently holds, not for conflicts. DHCPNACK is a negative response from the server to a request it can’t fulfill, and DHCPACK is the successful acknowledgment that a lease has been granted, not the signal for a conflict.

In DHCP, after a client receives an offered IP, it should verify that the address isn’t already in use (usually by an ARP probe). If a conflict is detected, the client informs the server by sending a DHCPDECLINE to indicate that the chosen IP is taken. The server then knows not to assign that address and will offer another one. DHCPRELEASE is used when a client willingly gives up a lease it currently holds, not for conflicts. DHCPNACK is a negative response from the server to a request it can’t fulfill, and DHCPACK is the successful acknowledgment that a lease has been granted, not the signal for a conflict.

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