14 Dynamic ARP Inspection
This chapter covers
- Address Resolution Protocol–based attacks such as ARP poisoning
- How Dynamic ARP Inspection protects against ARP-based attacks
- Configuring DAI on Cisco IOS switches
We first covered Address Resolution Protocol (ARP) in chapter 6 of volume 1, and it has come up several times throughout this book. ARP is an essential protocol in IP networks, serving as the bridge between Layer 2 and Layer 3 by mapping IP addresses to their corresponding MAC addresses. However, like many protocols, ARP is susceptible to exploitation that can compromise the security of a network. Dynamic ARP Inspection (DAI), the topic of this chapter, is a security feature on Cisco switches that we can use to mitigate such threats. ...
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