=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 200 OK
Content-Type: image/png
Expires: Fri, 03 Dec 2021 11:19:05 GMT
Date: Thu, 02 Dec 2021 11:19:05 GMT
Cross-Origin-Resource-Policy: cross-origin
Content-Security-Policy: script-src 'nonce-h3q4xpkq6+1MwzqWYWk1Pw' 'unsafe-inline';object-src 'self';base-uri 'self';report-uri /s2/_/FaviconHttp/cspreport;worker-src 'self'
Content-Security-Policy: require-trusted-types-for 'script';report-uri /s2/_/FaviconHttp/cspreport
Report-To: {&quot;group&quot;:&quot;FaviconHttp&quot;,&quot;max_age&quot;:2592000,&quot;endpoints&quot;:[{&quot;url&quot;:&quot;https://csp.withgoogle.com/csp/report-to/FaviconHttp/external&quot;}]}
Cross-Origin-Opener-Policy: same-origin; report-to=&quot;FaviconHttp&quot;
Server: ESF
X-XSS-Protection: 0
X-Frame-Options: SAMEORIGIN
X-Content-Type-Options: nosniff
Cache-Control: public, max-age=86400
Content-Length: 545
Age: 86398
Connection: close

Request headers
================
HEAD /s2/favicons?domain=docs.google.com HTTP/1.1
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Host: www.google.com
Accept: */*
Referer: http://web-marketing.zako.org
Connection: close


Link is valid.