Question
Consider Figure 5.33 in problem P14. Provide MAC addresses and IP addresses for the interfaces at Host A, both routers, and Host F. Suppose Host A sends a datagram to Host F. Give the source and destination MAC addresses in the frame encapsulating this IP datagram as the frame is transmitted (i) from A to the left router, (ii) from the left router to the right router, (iii) from the right router to F. Also give the source and destination IP addresses in the IP datagram encapsulated within the frame at each of these points in time.
Answer
Refer the Figure 5.33 in problem P14 in the text book.
Assume Host A sends a datagram to Host F.
The following source and destination MAC addresses in the frame encapsulating this IP datagram as the frame is transmitted:
(i) From A to the left router:
Source MAC address: 00-00-00-00-00-00
Destination MAC address: 22-22-22-22-22-22
Source IP: 111.111.111.001
Destination IP: 111.111.111.002
(ii) From the left router to the right router:
Source MAC address: 33-33-33-33-33-33
Destination MAC address: 55-55-55-55-55-55
Source IP: 122.222.222.002
Destination IP: 122.222.222.003
(iii) From the right router to F:
Source MAC address: 88-88-88-88-88-88
Destination MAC address: 99-99-99-99-99-99
Source IP: 133.333.333.002
Destination IP: 133.333.333.003