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- 1Physical TopologyThe physical layout of devices on a network and how the cables and wires connect these devices.
- 2Logical TopologyHow data is transmitted and received between devices on a network regardless of their physical connections.
- 3TopologyThe way in which the devices (nodes) are connected.
- 4NodeA device that is connected to the network.
- 5Physical Bus topologyAll nodes are connected to a single backbone. The backbone is a single wire that carries data packets to the nodes. Terminators must be installed at the two ends of the backbones.
- 6Advantages of Bus TopologiesLess cable required than in other topologies.
- 7Disadvantages of Bus TopologiesUnable to accommodate a large number of nodes - such as those required for LAN's
A single break in the backbone disables the entire network. - 8Physical Ring topologyEach node connects to exactly two other nodes, forming a complete ring, which generally circulates data packets in one direction. Each node receives data from one node and transmits to the other.
- 9Advantages of Ring TopologiesThere are dirty jokes that can be made about it...If you're feeling particularly inventive.
- 10Disadvantages of Ring TopologiesIf one cable is broken the entire network is disabled
To remove or add a node, the entire network must be stopped
All nodes must be powered at all times if the network is to operate. - 11Mesh topologyThese include more than one physical path between pairs of nodes. Routers are required for mesh topologies.
- 12Advantage of Mesh TopologiesFault tolerance, as packages are automatically routed around faults.
Can be used in high-speed long distance connections. - 13Disadvantages of Mesh TopologiesRouters are required to direct each datapacket.
- 14Physical Star TopologyAll nodes connect to a central node via their own dedicated cable.The central node is the device that connects all outlying nodes such that they can transmit and receive packets to and from each other node.
- 15Advantages of Star TopologiesEach node had its own cable and can be connected and disconnected without affecting any other nodes
New nodes can be easily added without first disabling the network
The process of identifying faults is made more simple. - 16Disadvantages of Star TopologiesA lot of cabling is required
If a fault occurs in the central node then all connected nodes are also disabled. - 17Physical Hybrid TopologyAlso known as tree topologies. These use a combination of connected bus, star and ring topologies.
- 18Advantages of Hybrid TopologiesNew nodes can be easily connected.
- 19Disadvantages of Hybrid TopologiesSingle transmission path between any two nodes
High costs for cables with high data transfer speeds. - 20NetworkA group of connected computers
- 21Physical Media -> Coaxial CableA copper cable that is cheap easy to install but suffers form noise and limited bandwith
- 22Physical Media -> fiber opticA glass cable that transit data in the from of light. It is difficult to install and expensive but is also the fastest
- 23Physical media -> Twisted PairA copper cable made of a twisted bundles. It is more difficult to install than coaxal needing equipment but is faster
- 24LANLocal area Network
a network in one building - 25WANWorld area Network
internet - 26MANMetro Area network
Network between buildings - 27PANPerson Area network
bluetooth - 28VPNVirtual Private Network
Connects two or more physical networks together
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- FlashCards sobre Revision, criado por Paul Lacey em 25-09-2015.
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- Paul Lacey
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