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All new laptops come with a wireless network adapter.
All new laptops come with wireless network cards already built into them
A wireless NIC (Network Interface Card) is a hardware component that allows a device to connect to a wireless network. It enables the device to send and receive data wirelessly using Wi-Fi technology. Wireless NICs are commonly found in laptops, smartphones, tablets, and other devices that require wireless internet connectivity.
A wireless card for laptops is used to enable the laptop to connect to a wireless network. A wireless router is used to keep track of the whereabouts of devices connected to the network. It is part of the network. This is a very basic answer but I think it should be enough to answer your question.
A wireless router.
Enabling a internal wireless network adapter requires installation of the hardware on your computer. Once installed you will be able to add a network to the adapter.
Network interface card
The most common and simplest ways is with an HDMI cable. You can find them relatively cheap on the internet compared to actual stores.
wireless access points, wireless network interface cards (NICs) and routers.
It is a technology where we combine fiber and wireless technology seamlessly.
99.9% of modern laptop have both wireless as well as wire network interface.