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Authors:
James F. Kurose, Keith W. Ross
Chapter:
The Network Layer
Exercise:
Problems
Question:21 | ISBN:9780132856201 | Edition: 6

Question

Consider the network setup in Figure 4.22. Suppose that the ISP instead assigns the router the address 24.34.112.235 and that the network address of the home network is 192.168.1/24.

a. Assign addresses to all interfaces in the home network.

b. Suppose each host has two ongoing TCP connections, all to port 80 at

host 128.119.40.86. Provide the six corresponding entries in the NAT translation table.

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Answer

a) Home address : 192.168.1.1, 192.168.1.2, 192.168.1.3, 192.168.1.4

b) NAT Transalation table 

 

WAN side LAN side
24.34.112.235.4000 192.168.1.1.3345
24.34.112.235.4001 192.168.1.1.3346
24.34.112.235.4002 192.168.1.1.3345
24.34.112.235.4003 192.168.1.1.3346
24.34.112.235.4004 192.168.1.1.3345
24.34.112.235.4005 192.168.1.1.3346

 

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