Data

IP: Layer 2 send this to 192.168.3.2.

As with the example in Chapter 1, "Building a Simple Network," Address Resolution Protocol (ARP) does not have an entry in its MAC address table, so it must place the packet in the parking lot until it uses ARP to resolve the Layer 3 logical IP address to the Layer 2 physical MAC address. This is shown in Figure 2-6.

Figure 2-6 Checking the ARP Table

Layer 2: ARP, do you have a mapping for 192.168.3.2?

ARP: Is 192.168.3.2 in my ARP table? No, Layer 2 will have to put the packet in the parking lot until I do an ARP.

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