Segmenting Data Before Sending

Figure 9-8. Segmenting Data Before Sending

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TCP on the web server breaks the 3000 bytes of application data into three segments in this example. HTTP gives all 3000 bytes to TCP. TCP happens to have an mss of 1480, and because each TCP header is 20-bytes in length, only 1460 bytes can be put into the data part of a segment. Because TCP needs three segments in this case, it puts 1/3 or so of the data into each segment, as shown.