Summary
Today we introduce the TCP/IP, a standard communication network protocol commonly used when communicating over the internet and other computer networks. The TCP/IP protocol guarantees the message being sent by a server is received by a client without error. We will look at a simple application of the protocol using a PIC32 Microcontroller Unit (MCU) as a server and a Windows machine as a client. By analyzing the raw Ethernet frame transmission of the TCP/IP messages we better the understanding of how TCP/IP successfully transmits data. The analysis of the frames show how a client first establishes a socket connection to a server, then sends a command to the server, and finally completes the communication medium by waiting for a response back from the server. The TCP/IP protocol has some overhead messages on top of the messages sent by the client to ensure data integrity on both sides.