A.DHCP Discover-DHCP Offer-DHCP Request-DHCP Ack B.DHCP Request-DHCP Ack-DHCP Discover-DHCP Offer C.DHCP Request-DHCP Offer-DHCP Discover-DHCP Ack D.DHCP Discover-DHCP Ack-DHCP Request-DHCP Offer
A.高 B.低 C.一樣
A.上翹 B.下頃 C.變大 D.保持不變