10.0.0.0-10.255.255.255

172.16.0.0-172.31.255.255

192.168.0.0-192.168.255.255

       -   LAN
(      ). ,   IP-
,      ,   -
 ,      .    
  ,       DNS,  -
 ISP     . ,   -
  ,        Internet.

privileged port ( ).   ,  1024.  Linux 
 UNIX-   root    -
 .   Windows 98     Windows 
   .

procedure ().      -
.   ,      ,  -
   ,     -
   . .  . FOLDOC

process ().    Linux. .  ""  9.
.profile file ( .profile).  ,    Bourne Again
Shell  Z Shell     .  Shell     . login.
   .profile   ,    -
 .

program ().      -
 .  Linux,       .
   ,    ,  .

PROM ().    . 
 . ,      
.

prompt ().  ,    ,  -
,     .   ,  
  , , mail.   
Bourne Again Shell  Z Shell       ($),  
Shell    (%).

protocol ().   ,   , 
 .       ,
    ,   ,    
 .     ,  
  ,    ,  , -
    . FOLDOC

proxy (). ,     ,   
 . .  -  -.

proxy gateway (-). ,   ( ) 
Internet,      ,   Internet  
. -      Internet-, , HTTP 
   ,   . ,  ,
  -  ,   . - -
    .

988  VII. 