Which two statements are true about Dynamic ARP Inspection?

Dynamic ARP Inspection (DAI) serves as a security feature in networking that helps to prevent ARP spoofing attacks by validating ARP packets in a LAN. One of its fundamental characteristics is that it is indeed disabled by default. This means that network administrators must specifically enable it on the relevant interfaces or VLANs where they wish to enhance security.

When enabled, Dynamic ARP Inspection functions by inspecting all ARP traffic on the specified ports or VLANs, thereby allowing only valid ARP requests and responses based on the entries found in the DHCP snooping binding database. This ensures that devices on the network cannot easily impersonate others and helps maintain the integrity of the network's addressing.

While some might assume that DAI could be globally enabled by default to enhance security from the outset, the reality is that this feature requires careful configuration specific to the unique topology and requirements of a network, which justifies it being disabled by default. This approach allows administrators the flexibility to turn it on strategically rather than having it universally enforced without consideration of existing network setups.