A network administrator at a small firm is configuring an office wireless router to ensure that only authorized company devices can connect to the network. The administrator decides to use device addressing to control access. What method should the administrator implement to permit only specific devices to access the network?
Modify DNS settings to include device verification
Restrict IP addresses in the router settings
Implement MAC filtering
Implement an internal firewall with specific rules for device traffic
MAC filtering is the correct method for controlling network access based on the hardware addresses (MAC addresses) of devices. This system allows the administrator to define a list of MAC addresses that are authorized to connect to the network, preventing unauthorized devices from accessing network resources, thereby offering a basic layer of security. Using IP addresses alone would not be as effective for this layer of network access control, since IP addresses can be dynamically assigned and may change. Modifying DNS settings impacts how domain names are resolved into IP addresses and does not control network access. Implementing an internal firewall is generally used to control traffic between different segments of the network and doesn't prevent unauthorized devices from connecting to the network.
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What is a MAC address and why is it important for MAC filtering?
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What are the limitations of using MAC filtering for network security?