Which of the following access control methods allows or blocks devices based on MAC addresses?
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A. B. C. D.A.
The access control method that allows or blocks devices based on MAC addresses is port security.
Port security is a feature that is commonly used in switch ports to restrict access to the network. It allows administrators to control which devices can connect to the network based on the device's MAC address.
When a device connects to a switch port that has port security enabled, the switch learns the MAC address of the device and associates it with that port. The administrator can then configure the switch to allow or block traffic from that device based on its MAC address.
Port security is particularly useful in environments where unauthorized devices are a concern, such as in a corporate network or a public place like an airport or café. By controlling which devices are allowed to connect to the network, port security helps to prevent unauthorized access and improve network security.
ACL (Access Control Lists) is another access control method used to control network access by creating a set of rules that determine which traffic is allowed or denied. It can also use MAC addresses in the rules but ACL is typically associated with IP addresses.
Host IDS and Network IDS (Intrusion Detection Systems) are security systems that monitor network traffic to detect and prevent unauthorized access or attacks. They do not control access based on MAC addresses, but rather based on traffic patterns and signatures of known attacks.