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Networking
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- 1NetworkA group of connected computers
- 2Physical media-> Coaxial CableA copper cable that is cheap easy to install but suffers form noise and limited bandwidth.
- 3Physical media -> Fiber optic cableA glass cable that transit data in the form of light. It is difficult to install and expensive but is also the fastest.
- 4physical media -> twisted pairtwisted pair a little difficult to install but faster than coaxial
- 5Advantagesonly need files in one place.
resources can be shared.
Reduced costs
share information between remote locations - 6Disavangatesusers are dependent on network system
Security concerns
network maybe vulnerable to failure in a remote location.
Need expert staff - 7LanLocal Area Network
a network in one building - 8WANWide Area Network
internet - 9MANMetro Area Network
network between buildings - 10PANPersonal Area Network
Bluetooth - 11VPNVirtual Private Network
Connects two or more physical networks together - 12Physical TopologyThe physical layout of devises on a network and how the cables and wires connect these devices.
- 13Logical TopologyHow data is transmitted and received between devices on a network regardless of their physical connections.
- 14TopologyThe way in which the devices (nodes) are connected.
- 15NodeA device that is connected to the network.
- 16Example of nodesComputers, printers, hubs, switches and routers.
- 17Physical 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.
- 18Advantages of Bus TopologiesLess cable required than in other typologies.
- 19Disadvantages 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 - 20Physical 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.
- 21Advantages of Ring TopologiesThere are dirty jokes that can be made about it...If you're feeling particularly inventive.
- 22Disadvantages 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 - 23Mesh topologyThese include more than one physical path between pairs of nodes. Routers are required for mesh typologies.
- 24Advantage of Mesh TopologiesFault tolerance, as packages are automatically routed around faults.
Can be used in high-speed long distance connections - 25Disadvantages of Mesh TopologiesRouters are required to direct each datapacket
- 26Physical 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.
- 27Advantages 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 - 28Disadvantages of Star TopologiesA lot of cabling is required
If a fault occurs in the central node then all connected nodes are also disabled - 29Physical Hybrid TopologyAlso known as tree typologies. These use a combination of connected bus, star and ring typologies.
- 30Advantages of Hybrid TopologiesNew nodes can be easily connected
- 31Disadvantages of Hybrid TopologiesSingle transmission path between any two nodes
High costs for cables with high data transfer speeds
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- Descripción
- Fichas sobre Networking , creado por Zoe Thorne-Brown el 18/09/2015.
- Creado por
- Zoe Thorne-Brown
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