(a)
 HTTP/1.1 401 Authorization Required
 Date: Sun, 13 May 2001 1:01:17 GMT
 Server: Apache/1.3.6
 WWW-Authenticate: basic
 realm="Private-Web-Services-Realm"
 Content-Type: text/html

(b)
 GET /private/web/services HTTP/1.1
 Authorization: Basic Z2FuZGFsZjp0aGUtd216YXJk