December 2001
Intermediate to advanced
656 pages
27h 19m
English
Content preview from Networking Explained, 2nd Edition
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192 Networking Explained, Second Edition
A receives the acknowledgment for frame
1 and advances the left side of its send
window by one. Since this ACK carried a
WIN of four, A may now advance the right
side of its send window by one to maintain
a send window size of four. In doing so, A
is now permitted to transfer one more
frame, namely, frame 5.
B receives frame 4 and sends its
corresponding acknowledgment with a
window size of ve. Thus, once A
receives this acknowledgment, it will
change its send window to ve, which will
per
mit it to transfer ve frames.
ACK 2
WIN 3
ACK 3
WIN 3
A
0 1 2 3
0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7
(5)
ot A Sen er
0 1 2 3
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