Question 1

Consider the following scenario, assuming Mobile IP and IP version 4. A mobile host (MH) has a home address of 71.13.204.20; the address space for its home network is 71.13.204.0/24 and the home agent, at the gateway to this network, has address 71.13.204.0. The MH is currently at foreign network 210.4.79.0/4, where the foreign agent has IP address 210.4.79.0 and the MH receives care-of address 210.4.79.18. A remote client, with IP address 56.1.78.22, generates a datagram for the mobile node. The remote client does not use Mobile IP. Suppose the home agent tunnels this datagram to the MH using IP-in-IP encapsulation. Consider the datagram going from the HA to the MH. (a) The source address in the inner header of the datagram is . (b) The destination address in the inner header of the datagram is . (c) The source address in the outer header of the datagram is . (d) The destination address in the outer header of the datagram is . Note: Please use IP addresses in dot-decimal notation, and include simply the 4-byte address (no /n notation).

Question 2

As a continuation of Question 1, now assume that the MH uses reverse tunneling with IP-in-IP encapsulation to send a datagram back to the remote client. (a) The source address field in the inner IP header is . (b) The destination address field in the inner IP header is . (c) The source address in the outer IP header is . (d) The destination address in the outer IP header is . Note: use IP addresses in dot-decimal notation. Include simply the 4-byte address (no /n notation).