Networking Explained, 2nd Edition

Chapter 3: The Internet and TCP/IP 113

but not yet processed by the application and data that arrived out of sequence, which

require TCP to reorder in the correct sequence. Using the window field, a receiver adver-

tises a window size that is less than or equal to the size of its available buffer space. Thus,

on the receive side, the available buffer space must take into account the amount of data

currently occupying the buffer at any given time.

On the send side, two things must be done. First, the sending entity must calculate a

window size that will limit the amount of data it can send. This calculation, which is a

function of the receiver’s advertised ...