... DHCP server: 223.1.2 .5 DHCP discover đến client src : 0.0.0.0, 68 dest.: 255 . 255 . 255 . 255 ,67 yiaddr: 0.0.0.0 transaction ID: 654 DHCP offer src: 223.1.2 .5, 67 dest: 255 . 255 . 255 . 255 , 68 yiaddrr: 223.1.2.4 ... 137.196.7.78 1A-2F-BB-7 6-0 9-AD 137.196.7.23 Mỗi nút IP (Host, Router) LAN có bảng ARP bảng ARP: ánh xạ địa IP/MAC cho số nút LAN 137.196.7.14 LAN 7 1-6 F 7-2 B-0 8 -5 3 137.196.7.88 5 8-2 3-D7-FA-20-B0 < địa ... 654 Lifetime: 3600 secs DHCP request thời gian src: 0.0.0.0, 68 dest:: 255 . 255 . 255 . 255 , 67 yiaddrr: 223.1.2.4 transaction ID: 655 Lifetime: 3600 secs DHCP ACK src: 223.1.2 .5, 67 dest: 255 . 255 . 255 . 255 ,...