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These cards slot into various ports on a motherboard or laptop. Their purpose is to offer features that are not present otherwise, such as networking, USB, Thunderbolt, and WiFi support. These cards typically fit into a spare PCI or PCIe slot on a desktop motherboard or to a dedicated I/O port on a laptop, and they provide an easy way to upgrade the system without having to switch out the motherboard and CPU.
Also known as a NIC (Network Interface Card ), these cards connect directly into the motherboard of your computer and feature an external network socket. This enables the computer to connect to a network via a network cable. Traditionally these network cards use the PCI slot on a motherboard, with newer cards using a PCIe interface. Advanced features include two or more network ports for specific applications. Note that network adaptors that convert a USB port into a network interface are also available.
These wireless network cards fit inside a computer (PC / notebook / Laptop) and connect using either the PCI, PCIe, M.2, Mini-PCIe interface. These Wireless Adaptors allow the computer to connect to a wireless network without having to run a network cable to the system. Advanced features such as high bandwidth and encryption ensure both a fast and secure connection to a WiFi network. Always check your motherboards interface for PCI or PCIe to ensure you select the correct wireless network card adaptor for your requirements.