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| The network topology defines the way in which | computers, printers, and other devices are connected. |
| A network topology describes the | layout of the wire and devices as well as the paths used by data transmissions. |
| the devices are connected by one single cable. | a bus topology |
| On a bus topology if more than one packet is transmitted at a given time, they | collide and have to be resent. |
| A bus topology is rarely used and would only be suitable for a | home office or small business with a few hosts. |
| The star topology is the most commonly used architecture in | Ethernet LANs. |
| A star topology is made up of a central connection point that is a | device such as a hub, switch, or router, where all of the cabling segments actually meet. |
| A star topology costs more to implement than | the bus topology |
| In a star topology if there is a problem with that cable, only | that host is affected. |
| When a star network is expanded to include an | additional networking device that is connected to the main networking device, it is called an extended star topology. |
| When used with network devices that filter frames or packets, like bridges, switches and routers, the extended star topology | significantly reduces the traffic on the wires by sending packets only to the wires of the destination host. |
| In a ring topology hosts are | connected in the form of a ring or circle. |
| In a ring topology a frame travels around the ring, | stopping at each node. |
| In a ring topology if a node wants to transmit data, it adds the | data as well as the destination address to the frame. |
| In a ring topology the frame continues around the ring until it finds the | destination node, which takes the data out of the frame. |
| The two types of ring topologies are | single ring, dual ring |
| A dual ring topology allows data to be sent | in both directions. |
| The most common implementation of the ring topology is in | Token Ring networks. |
| Fiber Distributed Data Interface (FDDI) is a dual ring technology that is similar to Token Ring, but it uses | light instead of electricity to transmit data. |
| The mesh topology connects all devices (nodes) to each other for | redundancy and fault tolerance. |
| A mesh topology is used in WANs to | interconnect LANs and for mission critical networks like those used by governments. |
| The hybrid topology combines | more than one type of topology |
| Physical topology refers to the | layout of the devices and media. |
| Logical topology refers to the | paths that signals travel from one point on the network to another. |
| The physical and logical topologies of a network can | be the same. |
| Token Ring uses a logical ring topology in | either a physical ring or physical star |
| Ethernet uses a logical bus topology in | either a physical bus or physical star. |
