Common Physical Network Topologies: How Different Computers In A Computer Network

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1.1 Describe common physical network topologies


Topologies describes the how different computers or other devices in a computer network is arranged. Topologies can be either physical (meaning placement of the components are arranged in a particular shape) or logical (meaning how data flows despite of its physical layout). There are different recognised topologies including star, mesh, tree and ring.
In a star topology, each network device (computer or peripheral) is linked to a central hub or a switch with a point-to-point access or connection. All the data and information is passed through the central hub before reaching to its destination. For example, in a small home network, all the computers or devices are connected to single
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IT looks very similar to tree topology diagram, only difference here is that rather than having group of computers (star network) connected to the main bus, here only single devices are connected to the main backbone cable. Thus advantages and disadvantage are going to be somewhat similar to star topology. In terms of advantages, network is easy to install and its layout is simple. It is cheap compare to other networks and length of cable is smaller. It has a liner layout and it 's mostly used in small networks, especially for LANs. Again the major disadvantage is the fact that it heavily relies on its backbone cable and if that goes down, whole network is crippled. Security is other problem as all devices within the network can "sense" signal or data from the source. Also cable can only handle certain amount of nodes and not suitable for heavy traffic situations.

In a ring topology, all nodes are linked in circular style, which means a single node has 1 input source and 1 output source. Data travels around in one direction, clock or anti clock direction (conceptually). It the data is not intended for a node, it will forward the signal or data to the next node and to the next until data is received my intended node. Thus each node is a link in a circle incorporating a receiver and transmitter to continue the data flow in the

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