# 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.
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.