=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Type: text/html; charset=UTF-8
Expires: Fri, 26 Nov 2021 19:16:41 GMT
Date: Fri, 26 Nov 2021 19:16:41 GMT
Cache-Control: private, max-age=0
Last-Modified: Sat, 04 Sep 2021 09:43:47 GMT
ETag: &quot;5e0b8a8d-bb90-45e4-80d4-b484c0d16394&quot;
X-Content-Type-Options: nosniff
X-XSS-Protection: 1; mode=block
Content-Length: 0
Server: GSE
Connection: close

Request headers
================
HEAD /2009/11/slow-transmitting-gears-optical.html HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: newopticalillusions.blogspot.com
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.