Final answer:
The attack where an attacker sends numerous forged frames to overwhelm a switch's MAC table is called MAC Flooding. This disrupts the switch's intelligent forwarding and compromises network security.
Step-by-step explanation:
When an attacker generates a large number of forged frames with the intent to overwhelm a switch's MAC (Media Access Control) table, this type of attack is known as B) MAC Flooding. The purpose of MAC Flooding is to disrupt the switch's capability to make intelligent forwarding decisions by filling the MAC table with so many entries that it runs out of space.
Once the table is full, the switch can no longer keep track of which MAC addresses are associated with which ports and begins to forward frames to all ports, effectively turning the switch into a hub. This can lead to information leakage and allows the attacker to eavesdrop on network traffic.