What is the best strategy to mitigate a MAC address table overflow during a DoS attack?

What is the best strategy to mitigate a MAC address table overflow during a DoS attack?

• A. Enable port security
• B. Increase the MAC address table size
• C. Implement VLAN segregation
• D. Enhance firewall rules

Answer: (A)

Enabling port security is an effective strategy to mitigate MAC address table overflow during a DoS attack. Port security limits the number of MAC addresses that can be learned on a single port of a switch. By configuring a maximum number of allowable MAC addresses per port, the switch can prevent excess MAC addresses from being added to its MAC address table. If the limit is reached, the switch can take actions such as shutting down the port, restricting access, or generating alerts. This helps protect the switch from being overwhelmed by a flood of spoofed MAC addresses, which is a common technique used in certain types of DoS attacks. Additionally, by employing port security, the network can maintain better control over which devices are allowed to communicate on the network, thus reducing the impact of malicious actors attempting to exploit the MAC address table. The other methods listed, such as increasing the MAC address table size or implementing VLAN segregation, may provide some level of improvement in managing network traffic but do not directly address the specific issue of limiting the influx of MAC addresses that typically leads to an overflow during a DoS attack.

Enabling port security is an effective strategy to mitigate MAC address table overflow during a DoS attack. Port security limits the number of MAC addresses that can be learned on a single port of a switch. By configuring a maximum number of allowable MAC addresses per port, the switch can prevent excess MAC addresses from being added to its MAC address table. If the limit is reached, the switch can take actions such as shutting down the port, restricting access, or generating alerts. This helps protect the switch from being overwhelmed by a flood of spoofed MAC addresses, which is a common technique used in certain types of DoS attacks.

Additionally, by employing port security, the network can maintain better control over which devices are allowed to communicate on the network, thus reducing the impact of malicious actors attempting to exploit the MAC address table. The other methods listed, such as increasing the MAC address table size or implementing VLAN segregation, may provide some level of improvement in managing network traffic but do not directly address the specific issue of limiting the influx of MAC addresses that typically leads to an overflow during a DoS attack.