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Prefer Wired Internet; Avoid Wireless Internet
Advanced topic. But highly recommended.
A wireless internet connection is a bad idea for security. Whenever possible, disable wireless everything, and use a wired connection (ethernet).
If you must use wireless internet, change the admin password on the wireless router. When I travel, I can drive around until I find an unsecured network and use it for internet access (convenient). Promiscuous wireless is like promiscuous sex— not a good idea.
How to configure your particular wireless router varies by brand, but can be done with most internet services without much difficulty.
$2699 SAVE $1600 = 37.0% Apple 15.4" MacBook Pro with Touch Bar (Late 2016, Space Gray) in Computers: Other
$4599 SAVE $300 = 6.0% Apple 27" iMac Pro with Retina 5K Display (Late 2017) in Computers: Apple Macs
$108 SAVE $55 = 33.0% Samsung 500GB T5 Portable Solid-State Drive (Blue) in Computers: Drives and Storage