          -
. roLDOC .   .

PASV FTP. .  FTP.

pathname ().  ,   (/)  -
  ,     .    -
       .

pathname element ( ).    ,  .

pathname, last element of  (  ).  ,   -
 /,    ,     .   . -
   .

peripheral device ( ). . .

persistent (). ,    , ,
  .

physical device ( ).  ,   
,       .

PID.  ,   . Linux   PID
  .

pipe ().   ,       
    .

pixel ().   ,      -
.

plaintext ( ).  . .  . .  
""  .

Pluggable Authentication Modules (  ). . .

point-to-point link ( ). ,   
, ,    .

port ().          . -
  Ethernet    TCP  UDP  
,           
  .

 /etc/services (  .    )  
 services  NIS       
.         ().
    :  80   (Web-) -
 HTTP.  ,   TELNET  HTTP ( 
  TELNET),     ,   -
   . )

port forwarding ( ). ,     
       .    -
      ,   ,      ,
    .      -
.

portmapper ( ). ,    TCP/IP 

  RPC. .   "  RPC"  10.
printable character ( ).    : , 

  ;   ,  , .

private address space (  ).  IANA  
 IP-   internet-   .   :

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