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A network interface controller (NIC, also known as a network interface card, [3] network adapter, LAN adapter and physical network interface [4]) is a computer hardware component that connects a computer to a computer network. [5] Early network interface controllers were commonly implemented on expansion cards that plugged into a computer bus.
Communications between the router and Ethernet devices are then conveyed over existing home electrical wiring. More complex networks can be implemented by plugging in additional adapters as needed. A powerline adapter may also be plugged into a hub or switch so that it supports multiple Ethernet devices residing in a common room.
An Ethernet crossover cable is a crossover cable for Ethernet used to connect computing devices together directly. It is most often used to connect two devices of the same type, e.g. two computers (via their network interface controllers ) or two switches to each other.
The dimensions of modular connectors are such that a narrower plug can be inserted into a wider jack that has more positions than the plug, leaving the jack's outermost contacts unconnected. The height of the plug's insertion area is 0.260 inches (6.60 mm) and the contacts are 0.040 inches (1.02 mm) apart (contact pitch), so the width is ...
As of Dec 2022, 10GBASE-T network equipment is still substantially more expensive than 1GBASE-T, 2.5GBASE-T, and 5GBASE-T network equipment. IEEE 802.3bz also supports power over Ethernet, which had previously not been available with IEEE 802.3an 10GBASE-T. As early as 2013, the Intel Avoton server processors integrated 2.5 Gbit/s Ethernet ports.
The confusion of needing two different kinds of cables for anything but hierarchical star network topologies prompted a more automatic solution. A twisted-pair Ethernet port with automatic MDI-X , or auto MDI-X or auto-crossover , automatically detects the required configuration, MDI or MDI-X, eliminating the need for crossover cables to ...