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Understanding Network Topologies Look up the seven types of Network Topologies shown below – Provide the definition and then explain the advantages and disadvantages of each in your own words! DO NOT COPY AND PASTE! YOU WILL NEED TO BE ABLE TO EXPLAIN & IDENTIFY THESE IN YOUR QUIZ ON FRIDAY! Network Topology Definition All the nodes are connected to each-other in such a way that they make a closed loop Advantages This type of network topology is very organized. Each node gets to send the data when it receives an empty token. This helps to reduces chances of collision. Also in ring topology all the traffic flows in only one direction at very high speed. Disadvantages Each packet of data must pass through all the computers between source and destination. This makes it slower than Star topology and if one workstation or port goes down, the entire network gets affected. Each of the network node, computer and other devices, are interconnected with one another. Every node not only sends its own signals but also relays data from other nodes Data can be transmitted from different devices simultaneously. This topology can withstand high traffic and even if one of the components fails there is always an alternative present. So data transfer doesn’t get affected. There are high chances of redundancy in many of the network connections and the overall cost of this network is way too high as compared to other network topologies. All the components of network are connected to the central device called “hub” which may be a hub, a router or a switch This gives far much better performance, signals don’t necessarily get transmitted to all the workstations. A sent signal reaches the intended destination after passing through no more than 3-4 devices and 2-3 links. Performance of the network is dependent on the capacity of central hub. Too much dependency on central device has its own drawbacks. If it fails whole network goes down and the use of hub, a router or a switch as central device increases the overall cost of the network. Network Topology Definition A fully connected network is a communication network in which each of the nodes is connected to each other Advantages A fully connected network doesn't need to use switching or broadcasting which is one of its advantages In this type of topology, all the nodes (computers as well as servers) are connected to the single cable by the help of interface connectors This is the simplest and cheapest to install and extend, and is well suited for temporary networks with not many nodes. It is very flexible as nodes can be attached or detached without disturbing the rest of the network. A tree topology is essentially a combination of bus topology and star topology. The nodes of bus topology are replaced with standalone star topology networks Extension of bus and star topologies. Expansion of nodes is possible and easy. Easily managed and maintained. In local area networks where bus Bus It is cost effective, its Cable topology is used, each node is required is little compared to other connected to a single cable, by network topology. Also it is used the help of interface connectors. in small networks. This central cable is the backbone of the network and is known as the bus Disadvantages A large amount of cabling is required, There is a high likelihood of redundancy in networks, and the overall cost of the network is way too high in comparison to the other network topologies. If the bus cable fails then the whole network will fail. Also the Performance of the network slows down rapidly with more nodes or heavy network traffic. The bus cable has a limited length and must be terminated properly at both ends to prevent reflected signals. Heavily cabled. Costly. If more nodes are added maintenance is difficult. Cables fails then whole network fails, and if network traffic is heavy or nodes are more the performance of the network decreases.