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Networking
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20265 posts
- TCP Working: 3-Way Handshake & Reliable CommunicationBefore your browser sends a byte of HTTP, it trades three packets with the server, and none of them carry data. They exist to agree on one thing: where to start counting.
- Networking Basics: Comparing TCP and UDP ProtocolsBefore a webpage sends one byte over TCP, there's already been a full round trip. A DNS lookup over UDP is one packet out and one back. TCP vs UDP is a trade between guarantees and speed.
- Getting Started with cURLWhen an API call fails in the browser, all you see is 'Something went wrong'. One terminal command sends the same request and shows you everything the server sent back.
- DNS Record Types ExplainedPointing a domain at your website takes one DNS record. Receiving email takes another. Proving to Google you own it takes a third. A, AAAA, CNAME, NS, MX and TXT records, and the job each one does.
- How DNS Resolution WorksYou type google.com and the page starts loading almost instantly. In that time a resolver may have asked three servers where google.com lives, and none of them knew the whole answer.