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networks/notes/01-introduction-OSI-model.md
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@ -75,7 +75,10 @@ We are unaware of how the letter actually gets to the destination. Did it go in
* Browser checks if the domain is in its cache. (to see the DNS Cache in Chrome, go to chrome://net-internals/#dns) * Browser checks if the domain is in its cache. (to see the DNS Cache in Chrome, go to chrome://net-internals/#dns)
* If not found in the cache, the browser also checks the local hosts file. * If not found in the cache, the browser also checks the local hosts file.
* If the browser does not have it cached nor can find it in the hosts file then it makes a request to the DNS server configured in the network stack. This is typically the local router or the ISP's caching DNS server. * If the browser does not have it cached nor can find it in the hosts file then it makes a request to the DNS server configured in the network stack. This is typically the local router or the ISP's caching DNS server.
4. Once the browser receives the IP address of the destination server, it takes that and the given port number from the URL, the browser opens a connection to the server and sends the request. 4. Once the browser receives the IP address of the destination server, it takes that and the given port number from the URL, the browser opens a connection to the server and sends the HTTP request.
5. The browser receives HTTP response and may close the TCP connection, or reuse it for another request
6. Finally, the browser decodes the response and displays the result on the screen.
## What is the OSI model? ## What is the OSI model?