What does the ip address dhcp command configure on an interface?
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Correct answer: to configure an interface as a DHCP client.
Why this is the answer
The ip address dhcp command configures an interface to obtain its IPv4 address and other IP configuration parameters (like subnet mask, default gateway, and DNS servers) automatically from a DHCP server. This makes the interface act as a DHCP client. Configuring an interface as a DHCP relay involves using the ip helper-address command, which forwards DHCP requests between different broadcast domains. Configuring an interface as a DHCP helper is not a standard Cisco command; ip helper-address is used for relaying. Configuring an interface as a DHCP server involves using commands like ip dhcp pool and network to define address pools and server parameters.
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