Now need to build a network room, the preliminary network equipment are needed?

Network adapter: also known as the network interface card (NIC), which is inserted in the computer bus will be connected to other network devices, network adapters in general only to achieve the physical layer of the network and the data link layer function.

Network transceiver: network adapter and transmission media interface device. It provides signal level conversion and signal isolation.

Network media conversion equipment: is a network of different transmission media between the conversion device. Such as twisted pair and optical fiber.

Multiplexer: a terminal controller. Used to improve the utilization of communication channels.

Interrupter: Also known as a transponder, extends the distance of the transmission media, such as Ethernet interrupters can be used to connect different Ethernet segments to form an Ethernet.

Hub: short for, hub, can be seen as a multi-port interruptor (an interruptor is a dual-port)

The above devices are all network devices that work at the physical layer.

Bridges: can connect two LANs into a logical LAN. It is a networking device that works at the physical layer and the data connectivity layer.

Switches: Early switches were the equivalent of multi-port bridges.

Router: A device that interconnects multiple networks at the network layer. It provides path selection between networks.

Gateway: can be seen as a generic term for interconnecting multiple networks, but is generally referred to as a device that interconnects multiple networks above the transport layer, also known as an application layer gateway.