Application Data

UDP Segment Structure
UDP Segment Structure

The application data shown in Figure 1 occupies the data field of the UDP segment. For instance, for DNS, the data field includes either a query message or a response message. For a streaming audio application, audio samples fill the data field. The UDP header has only four

Tags application data, query message, response message, end system, checksum, udp segment
TCP Segment Structure
TCP Segment Structure

Having briefly examined the TCP connection, let's look at the TCP segment structure. The TCP segment comprises header fields and a data field. The data field includes a chunk of application data. As mentioned above, the MSS limits the maximum size of a segments data field.

Tags tcp segment, application data, checksum field, flag field, cumulative acknowledgments
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