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4-port 10BASE-T Ethernet hub with selectable MDI-X/MDI port 8-port Ethernet hub with one 10BASE2 connector and eight 10BASE-T ports. An Ethernet hub, active hub, network hub, repeater hub, multiport repeater, or simply hub [a] is a network hardware device for connecting multiple Ethernet devices together and making them act as a single network segment.
A router [a] is a computer and networking device that forwards data packets between computer networks, including internetworks such as the global Internet. [2] [3] [4]A router is connected to two or more data lines from different IP networks.
Router/access server 2513 1 10Mbit/s 1 2 – – – Dual LAN/multiprotocol router 2514 2 10Mbit/s – 2 – – – Dual LAN/multiprotocol router 2515 – 2 2 – – – Dual LAN/multiprotocol router 2516 1 10Mbit/s – 2 1 – 14 10Mbit/s Router/hub 2520 1 10Mbit/s – 2 1 2 Low-speed (2x DB60) – Multiport serial routers 2521 – 1 2 1 2 ...
The prior Ethernet speed was 10 Mbit/s. Of the Fast Ethernet physical layers, 100BASE-TX is by far the most common. Fast Ethernet was introduced in 1995 as the IEEE 802.3u standard [ 1 ] and remained the fastest version of Ethernet for three years before the introduction of Gigabit Ethernet . [ 2 ]
Newer routers, hubs and switches (including some 10/100, and all 1-gigabit or 10-gigabit devices in practice) use auto MDI-X for 10/100 Mbit connections to automatically switch to the proper configuration once a cable is connected.
A repeater/repeater hub uses a jabber timer that ends retransmission to the other ports when it expires. The timer runs for 25,000 to 50,000 bit times for 1 Mbit/s, [ 59 ] 40,000 to 75,000 bit times for 10 and 100 Mbit/s, [ 60 ] [ 61 ] and 80,000 to 150,000 bit times for 1 Gbit/s. [ 62 ]
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