# What Is a Connection?
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41 min read
You click a button. A name appears. 200 milliseconds. Behind that click: DNS, TCP, TLS, HTTP, a load balancer, a connection pool, a database query, and every layer in reverse.
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# How Does a Light Switch Fill a Room With Light?
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49 min read
You flip a switch. Photons stream from a wire, cross the room, enter your eyes, and become seeing. Every step is the same force.
# How Do Two Clocks Agree?
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33 min read
Your watch and your laptop both say 3:00 PM. They've never communicated. How?