Скачать или смотреть How tcp works how to interpret the wireshark tcptrace graph

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okay, buckle up! this is going to be a deep dive into tcp, its mechanics, and how to analyze it using wireshark and `tcptrace`. we'll cover the theory, the practice of capturing traffic, interpreting the wireshark tcp stream graph, and how to use `tcptrace` with practical examples.

*i. tcp: the foundation of reliable internet communication*

tcp (transmission control protocol) is a connection-oriented, reliable, byte-stream protocol. it operates at the transport layer of the tcp/ip model and provides a robust and ordered delivery of data between applications running on different hosts.

*key features of tcp:*

1. *connection-oriented:* before data can be exchanged, a connection must be established between the sender and the receiver using a three-way handshake. this ensures that both sides are ready to communicate.

2. *reliable data transfer:* tcp guarantees that data arrives at the destination correctly and in the same order it was sent. it achieves this through:
*sequence numbers:* each byte of data is assigned a sequence number, allowing the receiver to reassemble data in the correct order.
*acknowledgements (acks):* the receiver sends acks to the sender to confirm that it has received data.
*retransmission:* if the sender doesn't receive an ack within a certain timeout, it retransmits the data.
*checksums:* each segment of data includes a checksum to detect errors introduced during transmission.
*flow control:* tcp prevents the sender from overwhelming the receiver by using a window size to indicate how much data the receiver can accept at a given time.
*congestion control:* tcp adjusts the sending rate to avoid network congestion and maintain fairness with other traffic.

3. *byte-stream protocol:* tcp treats data as a continuous stream of bytes, rather than individual messages. this allows applications to send and receive data in chunks of any size. tcp segments the data s ...

#TCP #Wireshark #python
TCP
Wireshark
tcptrace
TCP connection
packet analysis
TCP handshake
network protocol
data transmission
TCP segments
packet capture
network troubleshooting
latency analysis
flow control
throughput measurement
Wireshark graph interpretation