Different types of Topology
In the networking Topology is the geometric arrangement of the computers system, it defines the geometric arrangement of the system .The Topology refer to the way that a network laid out, it may be physically or logically. the topology made by connecting two or more link to connect the computers system.There are five types of topology these are-Bus topology, Ring topology ,Tree topology, Star topology ,and mesh topology.
Bus Topology
In a bus topology there is one long cable that act as backbone all the devises are connect through this cable. All the system is connected to the bus cable through the drop link. A drop link is a connection between the host and the main cable. Because bus topology use a single cable and the devices are connected to it. Somes of the energy is transferred in to the heat therefore it becomes weak for this reason the number of devices connected to the link should be limited.
The installation of the bus topology is easy. A bus topology uses less cable compare to the star, mesh and tree topologies. It is difficult to reconfiguration of the bus topology and also difficult to add new devices. The new add device require the modification of the backbone. And the small fault in the cable stops all the transmission between devices. This is the disadvantages of the bus topology.
Ring topology
It is similar to the bus topology except the two end of the cable are connected to each other to form a complete ring. A signal is passed through the link from one device to another device until it reaches to the destination. It is easy to install and configure to the systems.in this topology each device is linked to its next device if any new device need to add or remove it require only two connections to move.
Star topology
In the star topology the network designer designate one location that is the center of the star. It is consist a central hub through which all the other devices are connected. It is often used in the local area network. In the star topology each devices is dedicated point to point link to the central hub. The devices are not directly connected to each other, they communicate to each other through the central hub, because all the information are transfer through the central hub. The Star topology is less expensive compare to the mesh topology and the installation reconfiguration is also easy in the Star topology.
Mesh topology
In the Mesh topology every devices has a dedicated point to point link to every other devices. A mesh topology has several advantages over the other topology. First the dedicated link give the guarantee that each connection is carry its own data, this things eliminate the traffic problem. The other advantage of the Mesh topology that it gives privacy and security, when any message sent along to the dedicated link only the destination host can see it. The main disadvantage of the Mesh topology is that it is related to the amount of cabling and the input & output ports.
Tree topology
The Tree topology is the combination of the star topology. In the tree topology there is a central hub and the star topology are connected to this central hub. The central hub is known as active hub and the other hub that are connected to the central hub known as passive hub. An active hub contains the repeaters that regenerate the received signal before sending them to the destination hub. The advantages and disadvantages are same as the Star topology.
Hybrid Topology
Hybrid topology is the combination of the different topology like Bus topology, Star topology; Ring topology etc.it creates one larger topology by the combination of these topologies.
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