Figure 1-74 shows this operation.
Figure 1-74 Layer 2 Passes to ARP
ARP updates its table and passes the mapping to Layer 2. Figure 1-75 shows this operation.
Figure 1-75 ARP Updates the Table
Layer 2 can now send the pending Layer 2 packet. Figure 1-76 shows this operation.
Figure 1-76 Layer 2 Sends Packet Inside Frame to Start the Three-Way Handshake
At host 192.168.3.2, the frame is passed up the stack where encapsulation is removed. The
remaining protocol data unit (PDU) is passed to TCP. Figure 1-77 shows this operation.
Layer 2: ARP, here is something for you.
Packet
Parking Lot
ARP
Reply
Layer 3 = 192.168.3.1
Layer 2 = 0800:0222:2222
Layer 3 = 192.168.3.2
Layer 2 = 0800:0222:1111
Packet
Parking Lot
ARP: Layer 2, I have 192.168.3.2
mapped to 0800:0222:1111.
ARP: I just got an ARP reply from 192.168.3.3.
Let me add its IP and MAC to my ARP table.
ARP
Request
Layer 3 = 192.168.3.1
Layer 2 = 0800:0222:2222
Layer 3 = 192.168.3.2
Layer 2 = 0800:0222:1111
Layer 2: I can send out that pending packet.
Layer 3 = 192.168.3.1
Layer 2 = 0800:0222:2222
Layer 3 = 192.168.3.2
Layer 2 = 0800:0222:1111
SRC IP
192.168.3.1
SRC MAC
0800:0222:2222
DST MAC
0800:0222:1111
DST IP
192.168.3.
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