Internet Technology
Bytebytego
Bytebytego

@bytebytego

7 tweets 22 reads Jan 11, 2023
X
What happens when you type a URL into your browser?
Diagram below illustrates the steps.
1. Bob enters a URL into the browser and hits Enter. In this example, the URL is composed of 4 parts:
What happens when you type a URL into your browser? Diagram below illustrates the steps. 1. Bob ent...
🔹 scheme - 𝒉𝒕𝒕𝒑𝒔://. This tells the browser to send a connection to the server using HTTPS.
🔹 domain - 𝒆𝒙𝒂𝒎𝒑𝒍𝒆.𝒄𝒐𝒎. This is the domain name of the site.
🔹 path - 𝒑𝒓𝒐𝒅𝒖𝒄𝒕/𝒆𝒍𝒆𝒄𝒕𝒓𝒊𝒄. It is the path on the server to the requested resource: phone.
🔹 resource - 𝒑𝒉𝒐𝒏𝒆. It is the name of the resource Bob wants to visit.
2. The browser looks up the IP address for the domain with a domain name system (DNS) lookup. To make the lookup process fast, data is cached at different layers: browser cache, OS cache, local network.
2.1 If the IP address cannot be found at any of the caches, the browser goes to DNS servers to do a recursive DNS lookup until the IP address is found (this will be covered in another post).
3. Now that we have the IP address of the server, the browser establishes a TCP connection with the server.
4. The browser sends a HTTP request to the server. The request looks like this:
𝘎𝘌𝘛 /𝘱𝘩𝘰𝘯𝘦 𝘏𝘛𝘛𝘗/1.1
𝘏𝘰𝘴𝘵: 𝘦𝘹𝘢𝘮𝘱𝘭𝘦.𝘤𝘰𝘮
5. The server processes the request and sends back the response. For a successful response (the status code is 200). The HTML response might look like this:
𝘏𝘛𝘛𝘗/1.1 200 𝘖𝘒
𝘋𝘢𝘵𝘦: 𝘚𝘶𝘯, 30 𝘑𝘢𝘯 2022 00:01:01 𝘎𝘔𝘛
𝘚𝘦𝘳𝘷𝘦𝘳: 𝘈𝘱𝘢𝘤𝘩𝘦
𝘊𝘰𝘯𝘵𝘦𝘯𝘵-𝘛𝘺𝘱𝘦: 𝘵𝘦𝘹𝘵/𝘩𝘵𝘮𝘭; 𝘤𝘩𝘢𝘳𝘴𝘦𝘵=𝘶𝘵𝘧-8
<!𝘋𝘖𝘊𝘛𝘠𝘗𝘌 𝘩𝘵𝘮𝘭>
<𝘩𝘵𝘮𝘭 𝘭𝘢𝘯𝘨="𝘦𝘯">
𝘏𝘦𝘭𝘭𝘰 𝘸𝘰𝘳𝘭𝘥
</𝘩𝘵𝘮𝘭>
6. Browser renders HTML

Categories

Internet Technology

Some tweets missing

Telegram Bot
Unroll threads via Telegram! Send any X link to our bot.
@rattibha_bot

Report this thread