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Ethernet card is a Network Interface Card (NIC) that allows computers to connect and transmit data to the devices on the network. It may be an expansion card or built-in type.

Wireless:

Wireless networks enable more devices including mobiles sharing the resources and Internet connections remotely. But Compared to wireless networks, wired networks maintain a faster Internet speed and more secure.

Wired Networks:

Wired networks for larger area are more expensive. Wired networks are still used widely in the offices where need increased speed and secure connections.