 6.    WWW  HTTP_________________________243

   HTTP

 1996 .      1997 .   -
   HTTP  "HTTP/I.I".     -
  HTTP      
 .      "/1.1".

  "/1.1"      "OPTIONS"  "TRACE":

1.  "OPTIONS"     -
  ,  ,    -
   .       , 
 CGI-,  .   URI  -
("*"),        .

2.  "TRACE"    "".  
 ,      -
 .      -
        
.

   "General-Header"   
:

1.  "Cache-Control:"      -
 ,      
,       -
   .

2.  "Connection:"     -
  .  , HTTP-   ,
     .     
         .

3.  "Upgrade:"    ,  
       ( ),
 HTTP. : "Upgrade: HTTP/2.0, SHTTP/1.3, IRC/6.9,
RTA/xll".

4.  "Via:"     Proxy-
  ,     ( ).  
  "Received:"    , :

"Via: 1.0 fred, 1.1 nowhere.corn (Apache/1.1)".

  "Request-Header"     .
    :

1.     "Accept*:"  ("Accept:",  "Accept-Charset:",  "Accept-
Language:"),   ,     "/1.0"
  .   "1.1"    