hybrids network uses a combination of any _______ or more topologies?
Geometric representation of how the computers are connected to each other is known as topology. There are five types of topology Mesh, Star, Bus, Ring and Hybrid. Show
Types of TopologyThere are five types of topology in computer networks: 1. Mesh Topology 2. Star Topology 3. Bus Topology 4. Ring Topology 5. Hybrid Topology Mesh TopologyIn mesh topology each device is connected to every other device on the network through a dedicated point-to-point link. When we say dedicated it means that the link only carries data for the two connected devices only. Lets say we have n devices in the network then each device must be connected with (n-1) devices of the network. Number of links in a mesh topology of n devices would be n(n-1)/2. Advantages of Mesh topology1. No data traffic issues as there is a dedicated link between two devices which means the link is only available for those two devices. Disadvantages of Mesh topology1. Amount of wires required to connected each system is tedious and headache. Star TopologyIn star topology each device in the network is connected to a central device called hub. Unlike Mesh topology, star topology doesnt allow direct communication between devices, a device must have to communicate through hub. If one device wants to send data to other device, it has to first send the data to hub and then the hub transmit that data to the designated device. Advantages of Star topology1. Less expensive because each device only need one I/O port and needs to be connected with hub with one link. Disadvantages of Star topology1. If hub goes down everything goes down, none of the devices can work without hub. Bus TopologyIn bus topology there is a main cable and all the devices are connected to this main cable through drop lines. There is a device called tap that connects the drop line to the main cable. Since all the data is transmitted over the main cable, there is a limit of drop lines and the distance a main cable can have. Advantages of bus topology1. Easy installation, each cable needs to be connected with backbone cable. Disadvantages of bus topology1. Difficultly in fault detection. Ring TopologyIn ring topology each device is connected with the two devices on either side of it. There are two dedicated point to point links a device has with the devices on the either side of it. This structure forms a ring thus it is known as ring topology. If a device wants to send data to another device then it sends the data in one direction, each device in ring topology has a repeater, if the received data is intended for other device then repeater forwards this data until the intended device receives it. Advantages of Ring Topology1. Easy to install. Disadvantages of Ring Topology1. A link failure can fail the entire network as the signal will not travel forward due to failure. Hybrid topologyA combination of two or more topology is known as hybrid topology. For example a combination of star and mesh topology is known as hybrid topology. Advantages of Hybrid topology1. We can choose the topology based on the requirement for example, scalability is our concern then we can use star topology instead of bus technology. Disadvantages of Hybrid topology1. Fault detection is difficult. PreviousNext
|