When an IPv4 host uses Dynamic Host Configuration Protocol (DHCP) to obtain an address, which UDP port does the client typically use to receive replies from a DHCP server?
UDP port 68
UDP port 67
UDP port 69
UDP port 53
DHCP operates over UDP. The DHCP server listens for broadcasts on UDP port 67, while the client listens on UDP port 68 for the server's replies (DHCPOFFER, DHCPACK, etc.). Therefore, UDP 68 is the correct client-side port. Options 53 (DNS), 67 (server-side DHCP), and 69 (TFTP) are incorrect.
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