Network+ 2005 5-22: Ethernet and Token Ring Devices
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| Ethernet Hub | A device that takes transmits the signals from each device to every other on a star topology
-Operates at the physical layer
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| Passive Hub | A hub that just takes the signal on one cable and sends it down the others
-also called a concentrator
-most have power sources
-some have A BNC connector for a connection to a 10Base2 line or an AUI port to connect a transceiver
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| Active Hub | A hub that retransmits weak/damaged signals with proper voltage and current
-this resets cable length limitations for the network
-Some active hubs can resynchronize data that has been received out of std. time limits, and may alert the admin of this
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| Switching Hub | A hub that records the MAC of each NIC at power on, then looks at the destination of each packet received and retransmits the packet only to the recipient
-Has a memory buffer to hold packets as needed, which allows NICs of different speeds to be attache
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| Intelligent Hub | A term that can refer to any of a number of advanced management features such as a management webpage, traffic statistic and network event reporting, support for SNMP, routing/bridging functions, etc.
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| Token Ring Installation Facts -Max nodes/MSAU -Max MSAUs/Ring -Max Nodes/Port Cable (w/ Local Ring Hub) -Max Nodes/Ring | 8
12
4
64-72
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| Token Ring Max Distances Node-MSAU MSAU-MSAU MSAU-Repeater Max Network Length MSAU-Fiber Optic Repeater | 45 m
120 m
600 m
750 m (Type 1 cabling)
1.5 km (max. net. 4 km)
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| MSAU (MAU) | Multistation Access Unit
The 'hub' of a Token Ring network
-it makes the network act as a ring
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| Multiple MSAU Chaining | The Ring Out of each is plugged into the Ring In of the next
A total of two rings are completed, one for transmission and one for backup.
When a failure occurs, the MSAUs on either side detect it and use the backup ring
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| Patch Panel | A panel that has one network connector for each wall jack in a facility
-Patch cables are then used to make connections to hubs or MSAUs
-Must calculate patch cables into max. lengths
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| Transceiver | A device that links two media types without changing the channel access method
-Has an AUI port on one side and a 10Base2, 10Base5, RJ-45, or fiber optic connector
-called a Media Filter in a Token Ring context
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