NETWORK+ GUIDE TO
NETWORKS, FOURTH EDITION
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+&,-
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&   ./!#
$#$& %
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,( //  !
,+,/ /"/- 0
+0   / .*-
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  0 $ 
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*" .
 / 3 "4 !
!/(" 
("*( 5 2%
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' 6   .
/  
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'#
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6$#$ %
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#  
"
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7#1126
+&,-
Figure 4-1: A TCP segment
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+112-
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* !/ ( 
(*
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,:   
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"
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 (#  
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& (  
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./6  ;!#
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 *!
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+&,-
Figure 4-6: IP datagram data
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'%12-
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" 
!!*"
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  !  .
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  ! 
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  (
/!*"+2-;
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 
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1%1+11%,,1
12&12-
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% ('% 
* "
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!* :   
%1
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%,,1#+&,-
Figure 4-8: IP addresses and their classes
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B>C*!*//  .
!
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2(
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 <.60 $// *
 !/
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! <. & ; 2 ;
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*
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(  .6(* . .! 
 //. 
./ 
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+1%12-
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& ! 
*:'%. 
 " /"
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," /
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% "
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 ('%*
6

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,7+,D%'7
F&1%12-
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%// !.  . 8
*"*  
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% "
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1/   .  
/ ./ 
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1 ! .  .

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 (/*   
* . .# <.
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' .  !/(