Question: This problem refers to Figure 21.12. Suppose that LAN Z is the home network for host E and that D sends a block of data

This problem refers to Figure 21.12. Suppose that LAN Z is the home network for host E and that D sends a block of data to E via IP.

a. Show the PDU structure, including the fields of the IP header and the lower-level headers (MAC, LLC) with the contents of address fields indicated for the case in which E is on its home network.

b. Repeat part

(a) for the case in which E is on a foreign network reachable via the Internet through R3. Show formats for the MAC frame leaving D and the IP datagram leaving R3. Assume that IP-to-IP encapsulation is used.

c. Repeat part

(b) for the IP datagram leaving R3, but now assume that minimal encapsulation is used.

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