Definition of MAC Flooding:
MAC flooding is an attack where a malicious actor sends numerous fake MAC addresses to a switch, overwhelming its CAM table. The CAM table stores MAC addresses and their associated ports for efficient traffic forwarding.
Impact of MAC Flooding:
CAM Table Overflow: When the CAM table is full, the switch cannot learn new MAC addresses and is forced to broadcast traffic to all ports, leading to a degraded network performance and potential data interception.
Switch Behavior: The switch operates in a fail-open mode, treating the network as a hub, which can be exploited for eavesdropping on traffic.
Comparison with Other Attacks:
ARP Spoofing: Involves sending false ARP (Address Resolution Protocol) messages to associate the attacker ' s MAC address with the IP address of another device.
Evil Twin: Involves creating a rogue wireless access point that mimics a legitimate one to intercept data.
DNS Poisoning: Involves corrupting the DNS cache with false information to redirect traffic to malicious sites.
Preventive Measures:
Port Security: Configure port security on switches to limit the number of MAC addresses per port, preventing CAM table overflow.
Network Segmentation: Use VLANs to segment network traffic and limit the impact of such attacks.
[References:, CompTIA Network+ study materials on network security threats and mitigation techniques., , , , , , , ]
