How to Read Data Packets

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Reading ethernet packets on a network is an advanced technique that allows administrators to analyze traffic. If hacker attempts are made, the administrator can read the packets and determine the source. It's also a way for programmers to write network applications. The ethernet data packet has four parts to understand its source and destination.

  • Evaluate the order of a data packet. An ethernet data packet is arranged specifically in an order so that the recipient computer can correctly find the data. The following is the syntax of a data packet:
    Destination:::Sequence Code:::Data:::Check Sequence

  • Read the destination address. The first part of a data packet is the destination IP address. If the intended recipient is 192.168.1.1, this is the first part of a data packet. It ensures the right computer receives the packet.

  • Read the sequence code. A data transmission is chopped into several data packets. Each packet is given a sequence code. The sequence code is used by the recipient computer to properly put the chopped packets back together.

  • Read the data section. The data is the the main information sent to the recipient. The data packets need to be put together using the sequence code to read the data in its entirety.

  • Read the frame check sequence. The frame check sequence is an error checking mechanism. When routers become busy or start to fail, packets are lost or sent to the wrong destination. The frame check sequence checks to make sure the packet is sent to the right recipient. If it is not, it's dropped and data transmission is lost. This can lead to data corruption or transmission failure.

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