How the internet works
Follow packets across networks, routers and the request-response cycle.
What you will be able to do
- Packets are routed independently.
- IP addresses identify hosts; ports identify services.
- DNS turns names into addresses.
- HTTP is a request-response protocol on top.
In plain English
The internet is a network of networks that forwards packets. Your request is split into packets, routed hop by hop and reassembled at the destination. Application protocols such as HTTP sit on top of that transport.
curl -sS -o /dev/null -w 'dns %{time_namelookup}s connect %{time_connect}s tls %{time_appconnect}s total %{time_total}s\n' https://www.edubyte.tech/Your turn
MediumMeasure request phases
Use curl to print DNS, connect, TLS and total timings for a URL.
BASH · starter
curl -o /dev/null https://example.comCheck your understanding before moving on.
Knowledge checkQuestion 1
What does a port identify?
Select an answer to continue
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