Cheatsheet: Difference between revisions

= ARP vs MAC Table =

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! ARP Table !! MAC Table (or CAM Table)

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| Layer3 address to Layer2 address resolution || Layer2 address to Interface binding

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| Matches IP addresses to MAC addresses || Maps Ports to MAC addresses

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| Needed to forward packets at layer 3 || Used to Switch frames to the right output interface

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| Kept by L3 devices || Kept only by L2 devices

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| No entry for dest IP address, machine will send ARP request || If no entry, switch will flood the frame

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| Default timeout is 4 hours || Default timeout is 5 minutes

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| Filled by each ARP reply || Filled by source MAC of each frame passing through switch

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