Network hubs are used to connect multiple workstations for routing through a single link to a server. In computer network systems, hubs, switches, repeaters, and routers are used when creating a network. Network switches are used to provide each network transmission with an independent path through the network free of collisions with other network transmissions. Network repeaters are used to extend the distance covered by the network, and routers are used to route communication signals through the network. As is well-known in local area networks, computers may be connected to each other to enable them to communicate by way of a hub. Data signals sent from a transmitting component to a receiving component are transmitted to the hub and repeated at the hub for transmission to the receiving component. The network hub enables multiple computers, workstations, or file servers to share resources in a variety of applications. The simplest form of communications hub is what is known as a network repeater. Any communications sent by a computer would therefore be received by the repeater. The repeater simply retransmits any communication received on any port to all of the other ports, thereby enabling the communication to be received by all the other computers connected to the repeater. A typical network hub includes one or more devices for routing data transfers between a number of ports in a workgroup. Each port may be assigned to one or more individual users or one or more individual computers, workstations, or servers. Hubs typically have a limited number of input ports, so the number of workstations that can be connected is limited as well. To increase the number of ports available to a workgroup, multiple hubs may be connected. A network hub includes several attachment slots to hold line cards. Each line card contains one or more network devices attached to the hub. Internal data path resources within the hub are used to pass data between the multiple line cards. Hub connections are typically achieved by uplink cables, such as unshielded twisted pair (UTP) cables, shielded twisted pair (STP) cables, or fiber optic cabling.
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