D-Link DES-3852 Product Manual - Page 448
Router, Internet, Hacker
UPC - 790069289460
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xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch CLI Manual IP: 10.10.10.3 MAC: 00-20-5C-01-33-33 C IP: 10.10.10.1 MAC: 00-20-5C-01-11-11 A Port 3 Port 1 Router Internet IP: 10.10.10.254 MAC: 00-20-5C-01-54-54 Port 24 Port 23 Port 2 DNS server IP: 10.10.10.253 MAC: 00-20-5C-01-53-53 B Hacker A wrong ARP entry spreads over the network to spoof all PCs IP: 10.10.10.2 MAC: 00-20-5C-01-22-22 Figure-4 In the Gratuitous ARP packet, the "Sender protocol address" and "Target protocol address" are filled with the same source IP address itself. The "Sender H/W Address" and "Target H/W address" are filled with the same source MAC address. The destination MAC address is the Ethernet broadcast address (FF-FF-FF-FF-FF-FF). All nodes within the network will immediately update their own ARP table in accordance with the sender's MAC and IP address. The format of Gratuitous ARP is shown in Table-5. 444