Generally speaking, think of a MAC address like a physical street address and an IP address like a person's name. To get a message to "Brad," for instance, I need more than just the name. I also need a physical street address. Therefore, the ARP process, or MAC address resolution, will always be going on in the background. So if you are trying to keep certain devices off the network, one common method is to block the MAC address at the switch. Locking down the switch will prevent individuals from plugging in an unauthorized device.
Dig Deeper on Campus area network
Related Q&A from Michael Gregg
Enterprise security expert, Michael Gregg answers a question regarding port 3389 issues when a user tries to open port 3389 RDP on their router to ... Continue Reading
Security expert Michael Gregg discusses the disadvantages to a layered approach to enterprise security. Continue Reading
Security expert Michael Gregg fields a question about unknown network cards gaining access to a user's network. Continue Reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.