Ethernet hub

<p>An Ethernet hub, active hub, network hub, repeater hub, multiport repeater, or simply hub is a <a href="/facts/Network_hardware/ck0rIkXA">network hardware</a> device for connecting multiple <a href="/facts/Ethernet/nMfhU8tU">Ethernet</a> devices together and  making them act as a single <a href="/facts/Network_segment/D0gAdNdR">network segment</a>. It has multiple <a href="/facts/Input%2foutput/WQTE8Jas">input/output</a> (I/O) ports, in which a <a href="/facts/Signal/41YqUJ8c">signal</a> introduced at the input of any <a href="/facts/Computer_port_(hardware)/87F2NcNc">port</a> appears at the output of every port except the original incoming. A hub works at the <a href="/facts/Physical_layer/WuATCrVw">physical layer</a>. A repeater hub also participates in collision detection, forwarding a <a href="/facts/Jam_signal/N16l6pse">jam signal</a> to all ports if it detects a <a href="/facts/Collision_(telecommunications)/GNMdlntV">collision</a>. In addition to standard <a href="/facts/8P8C/M3BYRSFV">8P8C</a> ("<a href="/facts/RJ45/FJIzzlpD">RJ45</a>") ports, some hubs may also come with a <a href="/facts/BNC_connector/JCfgK3cf">BNC</a> or an <a href="/facts/Attachment_Unit_Interface/TMg2ru43">Attachment Unit Interface</a> (AUI) connector to allow connection to legacy <a href="/facts/10BASE2/FfgUgSUz">10BASE2</a> or <a href="/facts/10BASE5/vxgB15fH">10BASE5</a> network segments.
</p><p>Hubs are now largely obsolete, having been replaced by <a href="/facts/Network_switch/CnvmhNYT">network switches</a> except in very old installations or specialized applications. As of 2011, connecting network segments by repeaters or hubs is deprecated by IEEE 802.3.
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Ethernet hub open-in-new

Ethernet hub