Not sure what information is being passed by your web browser to a site you are visiting? This small utility displays all request headers being passed by a web request sent to network-tools.org
| Connection | Keep-Alive |
|---|---|
| Accept | text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 |
| Accept-Encoding | gzip |
| Host | www.portcheckers.com |
| If-Modified-Since | Mon, 25 Jun 2018 17:07:11 GMT |
| User-Agent | CCBot/2.0 (https://commoncrawl.org/faq/) |
When you open a page through a browser, typing in the address bar, there is a connection to a remote server, usually to port 80. Such a request is called GET-request - this is one of the main types of HTTP-protocol requests. Sending a request, as well as its contents, usually hidden from users, but there is nothing secret about them.