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These external hot pluggable cards are for PC's which feature the Express Card slot. Usually on laptops and available in two form factors, ExpressCard 34 & ExpressCard 54 which are sized 34 and 54mm respectively. Note that a 34mm slot will only accept a ExpressCard 34, with a 54mm slot able to accept both types.
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A network card is designed to connect a laptop, PC, workstation or server to a network, enabling communication with other internal users via network switches or access points; and the outside world via a router.

These external devices are designed for an external USB port of a system, feature RJ45 ports and will provide wired connectivity based on Ethernet at speeds up to 1Gb/s.

Build your own miniature PC or embedded device using SBC (Single Board Computers) from the Raspberry Pi ecosystem of ARM-based processors.

USB is the most common bus used to connect a huge variety of external devices to PCs, laptops and servers. It is not only used by peripherals such as keyboards and mice, but also storage devices such as external drives, smartphone and tablets and more.

These PCIe cards add extra USB 3.1 (up to 10Gb/s) or USB 3.2 ports (up to 10Gb/s) ports to your PC.