I would like to know, what is the prctical IOS for Cisco 3750X, 3560G, 2960 switches that is ideal with DHCP snooping, Dynamic ARP inspection, and IP source guard.
These features are supported in all (newer) IOS. But just to be sure if IOS version running on a particular switch supports XY feature it's best to check in feature navigator: http://tools.cisco.com/ITDIT/CFN/jsp/index.jsp
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