Definitions for teachers by teachers

Hub

A common connection point for devices in a network. Hubs are commonly used to connect segments of a LAN. A hub contains multiple ports. When a packet arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets. A passive hub serves simply as a conduit for the data, enabling it to go from one device (or segment) to another. So-called intelligent hubs include additional features that enables an administrator to monitor the traffic passing through the hub and to configure each port in the hub. Intelligent hubs are also called manageable hubs. A third type of hub, called a switching hub, actually reads the destination address of each packet and then forwards the packet to the correct port.

An example of a hub appears below:

by Marty Sierra-Perry

HUB

A hub is a device used to network computers together, usually over an Ethernet connection. It serves as the central node of a star-topology network linking workstations, servers, networks and network equipment. In a star/ring network, it is the location of wiring concentrators. Single communications cable segments connect to the hub like a star. In Ethernet/IEEE 802.3 terminology, a hub is an Ethernet multiport repeater, which is sometimes referred to as a concentrator or an access unit.

CNET Glossary - http://coverage.cnet.com/Resources/Info/Glossary/

A guide to Microsoft Windows NT Server 4.0, Michael J. Palmer, Course Technology, 1998

by Gloria Henke

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