Whichever core network vendor you’ve chosen (Cisco, Brocade, Juniper), you have an arsenal of great core network security features at your disposal. These include: Dynamic ARP Inspection, DHCP Snooping, Identity Based Network Services, Infrastructure Protection Access-Lists (iACLs), Router Neighbor Authentication, etc. The list is very long, most have been around for years, and many times NONE of them are in place at organizations big or small.
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