 6.    WWW  HTTP____________________________239

        401,  -
,   ,      
"WWW-Authenticate:",      , 
 ,    . , :

/1.0 401 Unauthorized

Date: Wednesday, 05-Feb-97 23:04:12 GMT

Server: NCSA/1.1

WWW-Authenticate: Basic realm="Joker"

/* line */

  WWW-     
,         -
.  "realm"      
 .    URI     -
  WWW  .       "Joker"  -
   "Basic".

  ,       
   ,    "realm".  
  ,      -
     , ,  -
  -  ,    
 .

      ,   -
,         
   "Authenticate:"   ,   
      base64,   -
  ,    "Basic".

,    "Aladdin",   "open se-
same",     base64,    "userpassword",
  : "Aladdin:open sesame",    
 :

GET /secret/security.html /1.0

Authorization: Basic QWxhZGRpbjpvcGVuIHNlc2FtZQ==

/* line */

   ,    
"Aladdin"   "Joker".    ,
   403 (forbidden).

 "basic"   -  -
        ,   
    ,    -
,     ,   -
   WWW-.