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OSI Model in Wireshark

The OSI model is a conceptual model that describes how data is transmitted over a network. It is divided into seven layers, each of which performs a specific function in the data transmission process. Wireshark is a network protocol analyzer that can be used to capture and analyze network traffic. Wireshark can be used to analyze network traffic at any layer of the OSI model. :

Here's how Wireshark maps the OSI model to its analysis capabilities:

1. Physical layer: Wireshark can capture and analyze the physical layer of a network, including the electrical signals, cables, and connectors used to transmit data.

2. Data link layer: Wireshark can capture and analyze the data link layer of a network, including the protocols and standards used to transfer data between network devices, such as Ethernet, Wi-Fi, and Bluetooth.

3. Network layer: Wireshark can capture and analyze the network layer of a network, including the protocols used to route data between networks, such as IP, ICMP, and ARP.

4. Transport layer: Wireshark can capture and analyze the transport layer of a network, including the protocols used to manage data transmission between end-to-end applications, such as TCP and UDP.

5. Session layer: Wireshark does not have a specific analysis capability for the session layer of the OSI model.

6. Presentation layer: Wireshark does not have a specific analysis capability for the presentation layer of the OSI model.

7. Application layer: Wireshark can capture and analyze the application layer of a network, including the protocols and data formats used by specific applications, such as HTTP, FTP, and DNS.

Overall, Wireshark is a powerful tool for analyzing network traffic at various layers of the OSI model, and it can provide valuable insights into network performance, security, and troubleshooting.

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OSI Model in Wireshark