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Analyze TCP Packets

Analyze TCP Packets in Wireshark to understand TCP handshake and stream reconstruction

41 Participants 30 Minutes Beginner

Welcome to our Packet Analysis Lab focused on TCP(Transmission Control Protocol). In this hands-on session, we will:
1. Understand TCP Handshake protocol.

2. Understand TCP streams and how to segregate different streams.

3. Reconstruct Streams

 

 

Transmission Control Protocol

Transmission Control Protocol is a connection-oriented communication protocol in computer networks. It ensures reliable and ordered data delivery between devices by establishing a virtual connection.

 

Key Features:

1. Reliability: TCP ensures reliable data delivery by using mechanisms like acknowledgments and retransmission of lost or corrupted packets. 

2. Connection-oriented: TCP establishes a connection before data exchange, creating a reliable, ordered, and full-duplex communication channel between two devices. 

3. Flow control: TCP includes flow control mechanisms to manage the rate of data transmission, preventing overwhelming the receiving device.

4. Error checking: TCP utilizes error-checking mechanisms, including checksums, to detect and handle data corruption during transmission. If errors are detected, TCP can request retransmission of the affected packets.

5. Full-duplex communication: TCP supports simultaneous two-way communication, allowing data to be transmitted in both directions between the sender and receiver.

 

Use Cases:

TCP is one of the main protocols of the Internet Protocol Suite. It is used in applications like web browsing, File Transfer Protocol, Email communication and others.

 

Problems:

1. TCP introduces overhead due to its connection-oriented nature and the need for extensive error-checking mechanisms.

2. The connection setup process in TCP involves a three-way handshake, which can introduce latency before actual data transmission begins.

3. Not Ideal for Real-Time Applications

 

Conclusion 

TCP, a cornerstone of the Internet Protocol Suite, plays a vital role in applications like web browsing, file transfer, and email communication. This hands-on session equips participants with a practical understanding of TCP's strengths and limitations, crucial for network professionals and enthusiasts alike. As technology evolves, the knowledge gained here will empower individuals to make informed decisions when implementing or troubleshooting TCP-based communication in diverse network scenarios.

Analyze TCP Packets

Support

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