This session focuses on the network security issues surrounding Layer 2, the data link layer. Because many network attacks originate inside the corporate firewall, exploring this soft underbelly of data networking is critical for any secure network design. Issues covered include Address Resolution Protocol (ARP) spoofing, MAC flooding, VLAN hopping, Dynamic Host Configuration Protocol (DHCP) attacks, and Spanning Tree Protocol concerns. Common myths about Ethernet switch security are addressed and specific security lockdown recommendations are provided. Attack mitigation options presented include the new DHCP snooping and Dynamic ARP Inspection (DAI) functionality. Attendees can expect to learn Layer 2 design considerations from a security perspective and mitigation techniques for Layer 2 attacks. This session is for network designers, administrators, and engineers in all areas of data networking.
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