China Wholesale Network Devices

Wholesale Computer Networking Devices from China

Computer networking devices are units that mediate data in a computer network. Computer networking devices are also called network equipment, Intermediate Systems (IS) or Interworking Unit (IWU). Units which are the last receiver or generate data are called hosts or data terminal equipment.

Router: a specialized network device (often wireless) that determines the next network point to forward a data packet toward to its destination. Unlike a gateway, it cannot interface different protocols. Works on OSI layer 3.

Bridge: a device that connects multiple network segments to the data link layer. Works on OSI layer 2.

Switch: a device that allocates traffic from one network segment to certain lines (intended destination(s)) which connect the segment to another network segment. So, unlike a hub, a switch splits the network traffic and sends it to different destinations rather than to all systems on the network. Works on OSI layer 2.

Hub: connects multiple Ethernet segments together which make them act as a single segment. When using a hub, every attached device shares the same broadcast domain and the same collision domain. Therefore, only one computer connected to the hub is able to transmit at a time. Depending on the network topology, the hub provides a basic level 1 OSI model connection among the network objects (workstations, servers, etc). It provides bandwidth which is shared among all the objects, compared to switches, which provide a dedicated connection between individual nodes. Works on OSI layer 1.

Repeater: device to amplify or regenerate digital signals received while setting them from one part of a network into another. Works on OSI layer 1.

Modem: device that modulates an analog "carrier" signal (such as sound), to encode digital information, and that also demodulates such a carrier signal to decode the transmitted information, as a computer communicating with another computer the telephone network.