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in the figure, assume the destination of the incoming packet is host 10.0.0.1, what should be the destination port number in the packet (the one marked as ????)? NAT translation table WAN side addr 138.76.29.7, 5001 138.76.29.7, 6000 LAN side addr 10.0.0.1, 3345 10.0.0.3, 2200 10.0.0.1 10.0.0.4 10.0.0.2, 138.76.29.7 10.0.0.3 S: 128.119.40.186, 80 D: 138.76.29.7, ???? a. 3345 b. 80 c. 5001 Od. 6000 S: 10.0.0.1, 3345 D: 128.119.40.186, 80 S: 10.0.0.3, 2200 D: 128.119.40.186, 80

in the figure, assume the destination of the incoming packet is host 10.0.0.1, what should be the destination port number in the packet (the one marked as ????)? NAT translation table WAN side addr 138.76.29.7, 5001 138.76.29.7, 6000 LAN side addr 10.0.0.1, 3345 10.0.0.3, 2200 10.0.0.1 10.0.0.4 10.0.0.2, 138.76.29.7 10.0.0.3 S: 128.119.40.186, 80 D: 138.76.29.7, ???? a. 3345 b. 80 c. 5001 Od. 6000 S: 10.0.0.1, 3345 D: 128.119.40.186, 80 S: 10.0.0.3, 2200 D: 128.119.40.186, 80

Database System Concepts
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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--- **Network Address Translation (NAT) – Educational Example** ### Question In the figure, assume the destination of the incoming packet is host 10.0.0.1. What should be the destination port number in the packet (the one marked as ????). ### NAT Translation Table | WAN side addr | LAN side addr | |---------------------|-----------------------| | 138.76.29.7, 5001 | 10.0.0.1, 3345 | | 138.76.29.7, 6000 | 10.0.0.3, 2200 | ### Diagram Description The diagram illustrates a network setup involving Network Address Translation (NAT). Here's a detailed breakdown of the components: 1. **NAT Translation Table**: The table maps Wide Area Network (WAN) addresses to Local Area Network (LAN) addresses and ports. 2. **WAN Address**: 138.76.29.7 3. **LAN Addresses**: - WAN Address 138.76.29.7, port 5001 is mapped to LAN Address 10.0.0.1, port 3345 - WAN Address 138.76.29.7, port 6000 is mapped to LAN Address 10.0.0.3, port 2200 4. **Incoming Packets**: - Packet from Source (S): 128.119.40.186, port 80 - Destination (D): 138.76.29.7, port ???? In the network: - When a packet arrives at WAN address 138.76.29.7 with port 5001, it is directed to LAN address 10.0.0.1 with port 3345. - When a packet arrives at WAN address 138.76.29.7 with port 6000, it is directed to LAN address 10.0.0.3 with port 2200. ### Answer Options a. 3345 b. 80 c. 5001 d. 6000 --- **Answer Explanation** The correct answer is based on the NAT translation table. If the packet's destination is 10.0.0.1, and according to the table: - WAN Address 138.76.29.7, port
Transcribed Image Text:--- **Network Address Translation (NAT) – Educational Example** ### Question In the figure, assume the destination of the incoming packet is host 10.0.0.1. What should be the destination port number in the packet (the one marked as ????). ### NAT Translation Table | WAN side addr | LAN side addr | |---------------------|-----------------------| | 138.76.29.7, 5001 | 10.0.0.1, 3345 | | 138.76.29.7, 6000 | 10.0.0.3, 2200 | ### Diagram Description The diagram illustrates a network setup involving Network Address Translation (NAT). Here's a detailed breakdown of the components: 1. **NAT Translation Table**: The table maps Wide Area Network (WAN) addresses to Local Area Network (LAN) addresses and ports. 2. **WAN Address**: 138.76.29.7 3. **LAN Addresses**: - WAN Address 138.76.29.7, port 5001 is mapped to LAN Address 10.0.0.1, port 3345 - WAN Address 138.76.29.7, port 6000 is mapped to LAN Address 10.0.0.3, port 2200 4. **Incoming Packets**: - Packet from Source (S): 128.119.40.186, port 80 - Destination (D): 138.76.29.7, port ???? In the network: - When a packet arrives at WAN address 138.76.29.7 with port 5001, it is directed to LAN address 10.0.0.1 with port 3345. - When a packet arrives at WAN address 138.76.29.7 with port 6000, it is directed to LAN address 10.0.0.3 with port 2200. ### Answer Options a. 3345 b. 80 c. 5001 d. 6000 --- **Answer Explanation** The correct answer is based on the NAT translation table. If the packet's destination is 10.0.0.1, and according to the table: - WAN Address 138.76.29.7, port
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