Chapter 6. Exploiting IPv4 ARP
Address Resolution Protocol (ARP) discovers the Layer 2 address of an IP neighbor. This protocol is not authenticated and can be fooled, especially with gratuitous ARP. In this chapter, you learn about ARP and the attack technique: ARP spoofing.
By adding to the DHCP snooping technique, it is shown that ARP spoofing can be prevented in a switched LAN.
Back to ARP Basics
When two IP hosts in the same IP subnet want to communicate over an Ethernet network, they must know each other’s MAC address to send Ethernet frames to the correct host. When one IP host wants to send datagrams to another IP host in a different IP subnet, the source needs to discover the MAC address of the IP gateway to the destination. In both ...
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