### 4.03-1. Network Address Translation (a)Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at point A?**Scenario:**- Host IP: 10.0.0.1- External Web Server IP: 128.119.40.186**NAT Translation Table:**| WAN Side Address | LAN Side Address ||------------------|------------------|| 138.76.29.7, 5051 | 10.0.0.1, 2020 |**Diagram Explanation:**- **Point A** is where the data is being transmitted from the LAN side to the WAN side.**Placeholders for the NAT Entry:**- WAN Side IP: 138.76.29.7- WAN Side Port: 5051- LAN Side IP: 10.0.0.1- LAN Side Port: 2020---**Answer the following:**1. **The source IP address is:** - Given: 10.0.0.12. **The destination IP address is:** - Given: 128.119.40.1863. **The source port number is:** - Given: 2020 4. **The destination port number is:** - Given: 5051**Visual Explanation:**The diagram illustrates the flow of data through a network with NAT. The points of interest mark the transition of data packets, with designated source and destination IP addresses and port numbers being translated as they pass through the NAT device.- **Point A** shows the initial connection details from the internal LAN host (10.0.0.1) heading out to the external web server.- The source IP (10.0.0.1) and port (2020) are translated to the external IP (138.76.29.7) and port (5051) by the NAT.**Note:**For further practice problems similar to this, you can refer to the provided link (here).

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4.03-1. Network Address Translation (a). Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at point A? [Note: You can find more examples of problems similar to this here.] S: D: B S: NAT translation table WAN side addr 138.76.29.7, 5051 138.76.29.7 The source IP address is: The destination IP address is: The source port number is: The destination port number is: LAN side addr 10.0.0.1, 2020 ****** 10.0.0.4 S D: 10.0.0.1 2020 S: 128.119.40.186 5051 D: 10.0.0.1 10.0.0.2 10.0.0.3

4.03-1. Network Address Translation (a). Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at point A? [Note: You can find more examples of problems similar to this here.] S: D: B S: NAT translation table WAN side addr 138.76.29.7, 5051 138.76.29.7 The source IP address is: The destination IP address is: The source port number is: The destination port number is: LAN side addr 10.0.0.1, 2020 ****** 10.0.0.4 S D: 10.0.0.1 2020 S: 128.119.40.186 5051 D: 10.0.0.1 10.0.0.2 10.0.0.3

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Network Protocols

A network protocol is a set of rules that govern how data is exchanged between the devices in a network. Network protocols enable communication between devices that are located in different parts of the world. Consequently, they are critical in today's digital communications.

Question

### 4.03-1. Network Address Translation (a)

Consider the following scenario in which host 10.0.0.1 is communicating with an external web server at IP address 128.119.40.186. The NAT table shows the table entry associated with this TCP flow. What are the source and destination IP address and port numbers at point A?

**Scenario:**

- Host IP: 10.0.0.1
- External Web Server IP: 128.119.40.186

**NAT Translation Table:**

| WAN Side Address | LAN Side Address |
|------------------|------------------|
| 138.76.29.7, 5051 | 10.0.0.1, 2020 |

**Diagram Explanation:**

- **Point A** is where the data is being transmitted from the LAN side to the WAN side.

**Placeholders for the NAT Entry:**

- WAN Side IP: 138.76.29.7
- WAN Side Port: 5051
- LAN Side IP: 10.0.0.1
- LAN Side Port: 2020

---

**Answer the following:**

1. **The source IP address is:**
- Given: 10.0.0.1

2. **The destination IP address is:**
- Given: 128.119.40.186

3. **The source port number is:**
- Given: 2020

4. **The destination port number is:**
- Given: 5051

**Visual Explanation:**

The diagram illustrates the flow of data through a network with NAT. The points of interest mark the transition of data packets, with designated source and destination IP addresses and port numbers being translated as they pass through the NAT device.

- **Point A** shows the initial connection details from the internal LAN host (10.0.0.1) heading out to the external web server.
- The source IP (10.0.0.1) and port (2020) are translated to the external IP (138.76.29.7) and port (5051) by the NAT.

**Note:**
For further practice problems similar to this, you can refer to the provided link (here).

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