Some of the typical requirements for a home/residential LAN are:

• Primary interest in downloading data, with minimal uploads; and
• A small limited number of people requiring access, typically with desktops and/or laptops, and these days, including smartphones and tablets;

I this scenario, your network would typically comprise of a router connecting to your ISP and providing multiple LAN ports for your desktops/laptops. Additionally, the router could also provide wireless access, or a separate wireless access point could be installed, to provide wireless connectivity for your smartphones/tablets.