=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Date: Tue, 30 Nov 2021 00:16:45 GMT
Server: Apache
Last-Modified: Mon, 02 Sep 2013 03:28:19 GMT
ETag: &quot;3d4e-4e55e29dedac0&quot;
Accept-Ranges: bytes
Content-Length: 15694
Vary: Accept-Encoding
Connection: close
Content-Type: text/html; charset=UTF-8

Request headers
================
HEAD /~isenburg/googleearth/ HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: www.cs.unc.edu
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.