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Forwards the DHCP request towards R1.
Multicasts the DHCP request to R1 and R3.
Drops the DHCP Request.
Sends a DHCP Request broadcast.
By default routers are not configured to forward DHCP Requests (or act as a DHCP relay). To configure a router to relay DHCP requests to the DHCP server use the command "ip helper-address". (It really depends on what kind of router you are using. If it is a Cisco device, then yes. If it a consumer grade AIO, it may have DHCP on by default)
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