Keep names and addresses separate
A name is a durable label. An address is one answer about where to try a connection. Treating them as separate observations makes a problem easier to describe.
Read · observe · return to a useful question
A short collection about names, identity and what a web request actually demonstrates.
This notebook begins with names and follows the question into a few related readings. Each note introduces one distinction, gives an ordinary example and ends with an idea to carry into a small check. Use the index to choose a starting point and return to it when the question changes.
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A name is a durable label. An address is one answer about where to try a connection. Treating them as separate observations makes a problem easier to describe.
A certificate check connects a secure session to the requested name. The page returned inside that session still deserves its own review.
A connection can fail before a name is resolved, during a secure handshake or after a request arrives. Naming the layer narrows the next check.
The opening reading, keep names and addresses separate, introduces the main question. The next two readings offer different ways to look at it: what a verified connection tells you and read a failure one layer at a time.
Each reading stands on its own and links to its neighbours. Follow the section list to a useful distinction, then return to the index when the question changes. A short record of what you observed will be more useful than reading everything at once.
Choose a note from the full index, or read how this notebook is arranged.