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A repeater hub can therefore only receive and forward at a single speed. Dual-speed hubs internally consist of two hubs with a bridge between them. Since every packet is repeated on every other port, packet collisions affect the entire network, limiting its overall capacity. A network hub is an unsophisticated device in comparison with a switch.
In the extreme case (i.e. micro-segmentation), each device is directly connected to a switch port dedicated to the device. In contrast to an Ethernet hub, there is a separate collision domain on each switch port. This allows computers to have dedicated bandwidth on point-to-point connections to the network and also to run in full-duplex mode.
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 ]
The difference between the two frequencies may be relatively small compared to the frequency of operation, say 1%. Often the repeater station will use the same antenna for transmission and reception; highly selective filters called "duplexers" separate the faint incoming received signal from the billions of times more powerful outbound ...
A hub provides a point-to-multipoint (or simply multipoint) circuit in which all connected client nodes share the network bandwidth. A switch on the other hand provides a series of point-to-point circuits, via microsegmentation, which allows each client node to have a dedicated circuit and the added advantage of having full-duplex connections.
The hub manages and controls all functions of the network. It also acts as a repeater for the data flow. In a typical network the hub can be a network switch, ethernet hub, wireless access point or a router. The star topology reduces the impact of a transmission line failure by independently connecting each host to the hub.
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A repeater hub or switch sits in the middle and has a port for each node. This is also the configuration used for 100BASE-T. Copper twisted pair cabling, star topology – direct evolution of 1BASE-5. As of 2024, still widely supported. 10BASE-Te: 802.3az-2010 (14) 100 m Cat-5
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related to: difference between repeater and hub- 1747 Olentangy River Rd, Columbus, OH · Directions · (614) 299-9425
