It is generally recommended to use GigE cameras on a desktop computer equipped with a dedicated Intel gigabit network adapter. This configuration ensures that the built-in network adapter remains available for connecting to your local network and/or the internet.
While it is technically possible to use a laptop with a built-in gigabit network adapter to connect to a GigE camera, the necessary configuration will make the Ethernet port unusable for standard network access. If a network connection is required, use wifi or a USB network adapter.
On a properly configured desktop PC with a four-port network adapter, you can record from up to four GigE cameras simultaneously.