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Implementing and Operating Cisco Security Core Technologies (SCOR) · Cisco
Select one answer.
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Answe D
The right answer is D. DAI can obtain its IP-MAC information from DHCP snooping or from ACLs statically configured by the admin, it could work without DHCP snooping, however, by default all the interfaces become untrusted, and you have to manually set the "no ip arp inspection trust" command on interfaces connecting to other switches, even if those switches do not support DAI, so the answer is D. You can read this, it's carefully explained: https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/12-2/25ew/configuration/guide/conf/dynarp.html
DHCP snooping is required for DAI.