A Switch or Network Switch is coupling element in a computer network, which connects network elements. Network Switches are also often called switching hub or bridging hub. Basically, Network Switches are divided in Layer-2-Switches and Layer-3-Switches or even higher Switches. Layer-2-Switches are, generally, simpler models and dispose of basic functions. These Layer-2-devices are often available without management functions. However, they can still dispose of functions such as port blocking or statistics calculation. The professional Layer-3-Switches or even higher Switches often feature management functions such as additional control and monitoring functions. If you want to configure your Netzwerk Switch with management functions or control it, this can be done (depending on the manufacturer of the device) by means of a command line (via Telnet or SSH), a web interface or special control software. Modern Network Switches are designed to prevent data collision, if two or more network users are transmitting at the same time. Furthermore, it is possible to set the speed and the duplex mode at each port individually. In order to increase bandwidth, two or more physical ports can be combined to one logical port (called bundling or Etherchannel). Many Network Switches provide the possibility to divide one physical port into several logical ports by using VLAN. The eibabo Online Shop also offers industrial Ethernet-Switches. The Network Switches must be prepared to meet the requirements that are special in industrial and manufacturing applications. These industrial Switches are designed for the many different and special network connections in industry: energy distribution, monitoring and control of safety functions as well as many other applications.