a. Consider the scenario in Figure 1 in which three hosts, with private IP addresses 10.0.1.12,...
Fantastic news! We've Found the answer you've been seeking!
Question:
Transcribed Image Text:
a. Consider the scenario in Figure 1 in which three hosts, with private IP addresses 10.0.1.12, 10.0.1.16, 10.0.1.18 are in a local network behind a NATted router that sits between these three hosts and the larger Internet. IP datagrams being sent from, or destined to, these three hosts must pass through this NAT router. The router's interface on the LAN side has IP address 10.0.1.25, while the router's address on the Internet side has IP address 135.122.191.218. S: D: S: D: NAT translation table WAN side addr LAN side addr 10.0.1.25 135.122.191.218 10.0.1.12 S D: 10.0.1.16 S: D: 10.0.1.18 Figure 1: NATted Router Suppose that the host with IP address 10.0.1.12 sends an IP datagram destined to host 128.119.164.181. The source port is 3485, and the destination port is 80. 1) Consider the datagram at step 1, after it has been sent by the host but before it has reached the NATted router. What are the source and destination IP addresses for this datagram? What are the source and destination port numbers for the TCP segment in this IP datagram? 2) Now consider the datagram at step 2, after it has been transmitted by the NATted router. What are the source and destination IP addresses for this datagram? What are the source and destination port numbers for the TCP segment in this IP datagram? Identify the differences in datagram's IP addresses and port numbers between step 1 and step 2. Specify the entry that has been made in the router's NAT table. 3) Next consider the datagram at step 3, just before it is received by the NATted router. What are the source and destination IP addresses for this datagram? What are the source and destination port numbers for the TCP segment in this IP datagram? 4) Last, consider the datagram at step 4, after it has been transmitted by the NATted router but before it has been received by the host. What is the source and destination IP address for this datagram? What are the source and destination port numbers for the TCP segment in this IP datagram? Identify the differences in datagram's IP addresses and port numbers between step 3 and step 4. Has a new entry been made in the router's NAT table, or removed from the NAT table? Explain your answer. a. Consider the scenario in Figure 1 in which three hosts, with private IP addresses 10.0.1.12, 10.0.1.16, 10.0.1.18 are in a local network behind a NATted router that sits between these three hosts and the larger Internet. IP datagrams being sent from, or destined to, these three hosts must pass through this NAT router. The router's interface on the LAN side has IP address 10.0.1.25, while the router's address on the Internet side has IP address 135.122.191.218. S: D: S: D: NAT translation table WAN side addr LAN side addr 10.0.1.25 135.122.191.218 10.0.1.12 S D: 10.0.1.16 S: D: 10.0.1.18 Figure 1: NATted Router Suppose that the host with IP address 10.0.1.12 sends an IP datagram destined to host 128.119.164.181. The source port is 3485, and the destination port is 80. 1) Consider the datagram at step 1, after it has been sent by the host but before it has reached the NATted router. What are the source and destination IP addresses for this datagram? What are the source and destination port numbers for the TCP segment in this IP datagram? 2) Now consider the datagram at step 2, after it has been transmitted by the NATted router. What are the source and destination IP addresses for this datagram? What are the source and destination port numbers for the TCP segment in this IP datagram? Identify the differences in datagram's IP addresses and port numbers between step 1 and step 2. Specify the entry that has been made in the router's NAT table. 3) Next consider the datagram at step 3, just before it is received by the NATted router. What are the source and destination IP addresses for this datagram? What are the source and destination port numbers for the TCP segment in this IP datagram? 4) Last, consider the datagram at step 4, after it has been transmitted by the NATted router but before it has been received by the host. What is the source and destination IP address for this datagram? What are the source and destination port numbers for the TCP segment in this IP datagram? Identify the differences in datagram's IP addresses and port numbers between step 3 and step 4. Has a new entry been made in the router's NAT table, or removed from the NAT table? Explain your answer.
Expert Answer:
Posted Date:
Students also viewed these programming questions
-
3. Stabilizing a rocket to a vertical position during the early stages of a launch is essentially the same task as stabilizing an inverted pendulum. Think of how you move your hand if trying to keep...
-
The Alberta Corporation maintains a perpetual inventory system but only keeps track of the number of units of inventory. The company actually makes its journal entries as is done in a periodic...
-
Air pollution officials in Californias Central Valley have opened a new front in the war against urban sprawl, and regulators and environmental advocates throughout the state are watching closely....
-
What is a financial intermediary, and what are some examples of financial intermediaries?
-
Compute repeat unit molecular weights for the following: (a) poly(vinyl chloride), (b) poly(ethylene terephthalate), (c) polycarbonate, and (d) polydimethylsiloxane.
-
Discuss the various dimensions and measures of value.
-
The director of continuing education at Bluebird University just approved the planning for a sales training seminar; her administrative assistant identified the various activities that must be done...
-
You are configuring a small network with static IP addresses. Once you have at least two of the systems configured, describe the simple test you will make to verify the ability of the computers to...
-
Which of the following compound do not show tautomerism : (1) (3) CH-C-H CH (2) (4) H,C CH
-
Review the article MSU Donations Drop 25%; NassarEffect Uncertain Addresses the following: You are a member of the External/Donor Relations team at Michigan State University. What would be your...
-
Explain with citation from text above. A. Do these two groups share the same values? One must wonder if in their early merger discussion did they ever discuss what the values were that they were...
-
What brainstorming activities would you recommend to a management team to help them think creatively and divergently? What makes you believe that your recommended strategies could be effective? How...
-
What metric can Olympic use to monitor the cost of the Medalist Program? Evaluate the value of this measure, as it was estimated for Olympic Rent-A-Car.
-
Hertz corporation brand equity model: 1.Brand Identity - Who Are You? 2.Brand Meaning - What Are You? 3. Brand Response - What Do I Think, or Feel, About You? 4. Brand Resonance - How Much of a...
-
Answer the following questions: 1. Some of the questions below require data as of a certain date. What is the date you are using for any market information you provide below? 2. What is the name of...
-
1) The government decided to reduce taxes on fast-food to increase revenue. The government assumes that fast-food products have a) An inelastic demand b) An elastic demand c) A demand curve that is...
-
The chapter provides sample goals for an initial sales call on a prospect. (a) What other goals can you come up with that might be appropriate for an initial sales call? (b) Develop three or four...
-
Pick any three of the sources of prospects discussed in the chapter and pick a product or service you like. Develop several ideas for how you would use each source to locate leads for the product or...
-
Why do you think a salesperson might experience call reluctance? How can it be overcome?
Study smarter with the SolutionInn App