From the course: Learning the Packet Delivery Process

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Step 3: ARP helps locate MAC addresses (local)

Step 3: ARP helps locate MAC addresses (local)

From the course: Learning the Packet Delivery Process

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Step 3: ARP helps locate MAC addresses (local)

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- [Joli] Continuing on from the last movie, we're now at step three, the local data delivery process. The internet layer can discern the source and destination's IP addresses. It needs to locate the recipient host's MAC address. Once it has this, it can complete its header and forward the packet to the next layer. There are several steps to obtaining the MAC address of a local host. First, the source must send an ARP request to the switch on the local network. The switch contains an ARP table that consists of previously-mapped IP addresses to MAC addresses. If the mapping is there, the MAC address is immediately available to the requester. You can see your own network's ARP table quite easily. Open a command prompt and type ARP, a space, and a dash followed by an A. You may recognize an internet address. I know this is my router and this is my router's physical address. See if you recognize any of the devices on your…

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