A switch is a device which connects computer network device together. Cisco switches are among the best networking device. It is a device that provides communication among the devices. At a time multiple devices can be connected with the switch. It manages the data flow among the connected devices. The devices which are connected with the switch are identified with their network IP address. Switches have multiple plug ports where the devices are connected. Among all the plug ports there is a single port where the data packets are received, after receiving the packets switch transfers those packets among the multiple receiver plug ports. So for data receiving purposes, there is a single port while for distributing the data among the networked connected computer devices there are multiple ports. It is used in networking devices as a network point edge. It behaves like a bridge for data transmission. It is used in LAN and WAN connection modes. These switches are easily programmable and reliable.

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