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longest i have seen in a store was 100ft but if you need longer get a roll of Ethernet cable and 3 ends for it then make your own length of cable.
The network device that regenerates data signals without segmenting the network is a repeater. Repeaters are used to prevent attenuation of signals.
The maximum number of hosts per class B network is 65536.
You would want to move to a Gigabit network. This will require a switch capable of Gigabit speeds, network cabling capable of Gigabit speeds (Cat 5e for example), and a network interface on a computer that is also Gigabit rated. Most modern switches are Gigabit rated (even inexpensive soho switches).
100 meters or 328 feet
100 meters or 328 feet unless a repeater (such as a switch or a router) is placed inline.
Simply upgrade your network hardware to 100baseT compatible devices and components, eg: Hubs, switches,routers, cables and computers(network cards)
ring/hybrid
Wireless networks often use repeaters to extend the network signal to distant locations. Ethernet repeaters are commonplace as well, as there are limits to the lengths that cables will function at.
Star Topology, where Hubs can act as repeaters.
Repeaters are usually used in coaxial based ethernet networks. For this purpose they are used to extend the length of a network segment. For example, in a 10base2 ethernet network the maximum length of a segment is 180 meters. A repeater could join two segments together to increase the length of the network and the number of clients in the network. In today's modern networks you will see neither coaxial networks nor repeaters in a LAN. Repeaters are used for DSL transmissions, but not for LANS.
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yes
Yes.
Repeaters and Hubs