This question is very easy to answer. A LAN is a Local Area Network. That really means it is local and therefore refers to the network that you a probably using right now, the one at home or at school maybe.
Your router, Smart TV, iPhone and MacBook in a network thus form a local network and thus a LAN.
QNAP QSW-M408-4C 10GbE Managed Switch, with 4-Port 10GbE SFP+/RJ45 Combo and 8-Port Gigabit
HP Full HD 1080p IPS LED Monitor with Frameless Bezel and VGA & HDMI -21.5-Inch, Silver
USB C Charger, KOVOL Sprint 120W 4-Port PD Fast Laptop Charger, Compact Type-C Charging Station, GaN Charger PPS Power Delivery for MacBook Pro/Air, Dell, iPad Pro, iPhone 13/12, Galaxy and More
$99.99
Logitech Circle View Apple HomeKit- enabled Wired Doorbell with Logitech TrueView Video, Face Recognition, Color Night Vision, and Head-to-toe HD Video
$189.99