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Network - Coggle Diagram
Network
Network Topologies
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There are a number of different network topologies. Some common network topologies include: Bus, Ring, Star and Mesh
BUS
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As the packets arrive at each computer system, it checks the destination address contained in the packet to see if it matches its ow
If the address does not match, the computer system ignores the packet. If the address of the computer system matches that contained in the packet, it processes the data
The computers (nodes) are connected to a single cable on which data can be sent, called the bus.
Pros and cons
Disadvantage
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Limited cable length and number of stations – performance degrades as additional computers are added
If there is a problem with the main cable or connection, the entire network goes down
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Ring - Each node connects to exactly two other nodes, providing a single pathway for signals through each node.
Advantages
The transmission of data is simple as packets travel in one direction only
Data is quickly transferred without a bottleneck, consistent data transfer speeds
Disadvantages
If any of the computer systems fail, the ring is broken and data cannot be transmitted efficiently
a problem with the main cable or connection and the entire network goes down
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Star -Where one or more central switch, hub or computer acts as a central conduit to transmit messages
pros and cons
advantages
Where one or more central switch, hub or computer acts as a central conduit to transmit messages
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disadvantage
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Extra hardware required, such as a hub
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Mesh
Each node relays data for the mesh network. All mesh nodes cooperate in the distribution of data in the network.
This is very reliable as it can 'self-heal' by reconfiguring around broken paths. This network is complex, expensive and difficult to set up. A large part of the network may be redundant
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Networking requirements
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Wireless is generally slower than wired in terms of bitrate although the advantage of greater freedom can offset this
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pros and cons
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Disadvantage
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If the server is down, all workstations on the network are affected
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LAN AND WAN
LAN
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in the same building or on the same site, such as a schooL
WAN
A WAN is a network in which the computers systems are all located distantly from each other, for example, in different buildings all over the country or in different countries.
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