Wireshark

INTRODUCTION:

Wireshark is a powerful, open-source network protocol analyzer used to capture and analyze data packets traversing a network in real time. It provides detailed insights into network activity, enabling users to troubleshoot issues, monitor traffic, and detect anomalies. With support for thousands of protocols and features like filtering, decryption, and graphical visualizations, Wireshark is widely utilized by network administrators, security professionals, and developers for diagnostics and forensic analysis. It is available for multiple platforms, including Windows, macOS, and Linux.

Commands

1.TCP :
In Wireshark, TCP (Transmission Control Protocol) is one of the most analyzed protocols. It is a reliable, connection-oriented protocol that operates at the transport layer of the OSI model. Wireshark enables users to inspect TCP traffic in detail, including the three-way handshake, sequence numbers, acknowledgments, retransmissions, and window size adjustments. It is particularly useful for diagnosing issues like slow network performance, packet loss, or connection resets.

2 UDP:
In Wireshark, UDP (User Datagram Protocol) is a connectionless, lightweight transport-layer protocol commonly used for low-latency communication like DNS queries, VoIP, and video streaming. Unlike TCP, UDP does not guarantee delivery or order, making it faster but less reliable.

3.IP:

In Wireshark, IP (Internet Protocol) is a fundamental protocol for packet-switched networking, enabling the delivery of data packets between devices. Wireshark supports both IPv4 and IPv6, allowing detailed analysis of IP headers and traffic.

4.DNS
In Wireshark, DNS (Domain Name System) is a crucial application-layer protocol used to translate human-readable domain names (e.g., example.com) into IP addresses. DNS analysis is particularly useful for troubleshooting network issues like slow web browsing or unreachable services.

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