01 / NETWORKSWhat happens when you open a website?
Your device first finds an address, then establishes an encrypted connection. Name resolution and encryption solve different problems: an address tells your browser where to go, while a certificate helps it check who answered.
02 / DIGITAL HABITSA little maintenance goes a long way.
Keep a second copy of important files, install updates regularly and use a different password for each account. Small repeatable habits are easier to maintain than a complicated setup you rarely check.
03 / TROUBLESHOOTINGChange one thing at a time.
When a connection fails, start with the simplest observation. Try another website or another network, record what changed and keep the last working configuration. A useful test should narrow down the possibilities.