Four Basic Topologies Network And Summarize

quaternary Basic Topologies Network And SummarizeNowadays, there obtain several types of entanglement topologies with diverse characteristic, price and level, it was precise important to choose a suitable prosecute. Now we are going to discuss four basic web topologies Bus, Ring, Star and Mesh.Lets discuss deal topologies scratch, bus engagement topologies is a wiz product line which wasting disease to connect to different points between network, as it only have peerless channel to support the bus network for communication, so the wide capacity leave behind send to altogether in all the points averagely. When a point desire to send instructions to an opposite point, it volition announce a contentedness to all the points thru wire and all the points leave behind see it but only the destination point pull up stakes receive and return the sum to the sender point, opposite points will non give any response.Bus network topologies are cheaper than other networ k topologies beca enforce it habituate less channel and materie and also the buildation is easier than other topologies. But because it is a single line of merchandise, when there have many points connect to the device, it will thick down the transmittance speed and the total capacity.On the other hand, once the network have problem, it address many quantify to fix it as you have to check all the cable linkup to find out the problems. Also in a bus topology, once a single contact ill, it will stop the passage between all points.(The image of the About.com move)Second topologies which we are going to discuss is Ring topology.In a ring network, to severally one apparatus connected to two users for communication purpose. It looks like a circle and the message move roughly the circle to each point use single direction. Each client connect to its own cable to the Medium Attachment Unit (MAU). Ring network topology is blue to install and reconfigure and also easy to add n ew boss as only two connections need changes.However, Ring network is non too convenience for the user as the data have to pass through all the points ahead getting to the destination. For example, if one network have six user, when the A computer penury to send message to F computer, it have to pass through B, C, D, E computer and then to F. And if one network failure, solid network will disable because it only have single pathway to transmit the data.(The image of the About.com guide )The third network topology is Star.Star network is one of the most usual computer network topologies. It features a central connection point call hub or concentrator (Bruce A Hallberg 2005) and it will radiate to other points. The characteristic of Star network is the hub or concentrator work as a central union to interpret different route for sharpen send out to any two sites. Data on protagonist network will send the message to hub or concentrator first before send to the destination point . Hub or concentrator works like a repeater for the data flow.In the star network topology, if one connection stoppage, only one node will lose the connection from this site and it wont be contact to other networks. On the other hand, it will be easy to find out the problem as all network is obey to hub, so once the network out of service, mostly it must be some problem with the hub and the problem can be fix quickly instead of checking all the points. Further more than, as hub is control everything included add or remove devices, that means Star network is easy to install. If you want to add some new devices to the network, just need to connect the cable to hub and other computer will detect the devices and can use it. It save lots times to install the devices to all computers separately in the network. Moreover, hub can also be act as a backup file, once the network is not work, you can move to another computer and use the data from hub.Although star network is more constant th an other network topology, but star network is more expensive as it needs more wires to support the network. And because it is fully obey to hub, once there have many nodes, the network maybe slow down.(The image of the Florida Center for Instructional Technology College of Education, University of South Florid 1997.)Last network topology we have to share is Mesh.Mesh network is a network where all the nodes connected to each other with different ways, maybe single hop or multiple hops.In a mesh network, if one node or cable have problem occur, there will have another way to legislate with other node, it wont be halt the whole network. Mesh network will also disregard the short way automatically while the message moving on the mesh network, that means the data no need to pass through all the points before reach to destination, it save many times for transaction the data.Mesh network is a network which is not easy to interruption by connection problem as there have many possible p atterns that can use. When one node failure to connect, mesh network will find another way to reach the destination easily.Mesh network separate to two similar types Full mesh and partial mesh.Full mesh which every node will connect to each other so the network can provide best prolixity office. Once one of the nodes breakdowns, connection between the networks will be unfalteringer under full mesh network because there have more possible route to reach to destination. Because of more wires need, so full mesh network is expensive than partial mesh network and it may also affect the set up procedure because of the complexity.For the economical reasons, some of the company will prefer to use the partial mesh network. In partial mesh network, devices are only connects to a subsection node instead of all nodes. This may affect the entire network once the connection have problem because it only have one or two ways to reach the destination point. Although the communication between the networks is not as strong as full mesh network, but the cost is cheaper than it, so nowadays partial mesh network is more popular than full mesh network.(The image of the network dictionary 2004)Physical communication media is a path that can let the electronic data move from one computer to another. And now will going to describe different physical communication media, for example Twisted-Pair cable, coaxal Cable and Fiber-optic cable.The first cable we are going to talk about is Twisted-Pair cable.Twisted-pair cable which can be subdivided as unshielded twisted pair (UTP) and shielded twisted pair (STP) (Bruce A Hallberg 2005). Both UTP and STP have cardinal separate brown metal wires and cover by insulate material. Besides, each pair of wires was wound to each other.UTP and STP not only have similar structure and also have similar transmission technology. Even though STP has a better protection interface and quality than UTP, but it cost more expensive and not easy to install.U sing Twisted-pair cables advantage is its size is smaller than others so that it will easy to install and it cost cheaper than Coaxial cable and Fiber-optic cable.On the other hand, the transmission signal is shorter than other communication media and the coverage area is only 100 meters.Another cable we are going to talk about is Coaxial Cable.Coaxial cable is cover by 4 layers pig wire, insulation, copper mesh and cable jacket. Coaxial cable can aid 10-100 Mbps and it coverage 500 meters. (Scribd n.d.)The advantage of Coaxial Cable is it can run for a long distance between network but use less power. The cost of Coaxial cable is cheaper than Fiber-optic cable and because of it use for many years, so it will be more popular.However, the size of Coaxial Cable not as thin as Twisted-pair cable, so it will be difficult to install and relatively the set up fee will be higher than Twisted-pair cable.The last one we have to talk about is Fiber-Optic cable.Fiber-Optic cable is do by nar row core and insulates material. It use the lights to transmission the date. Most of the corporate network will use Fiber-optic cable as back bones to connect different network.The advantage of Fiber-optic cable is it has a higher data speed and the higher bandwidth is good for future development.But Fiber-optic cable is not quite flexible as it cannot curve, so it will be more difficult to install and the cost is the most expensive one.Different computers have its own different purpose, we are going to examine Microcomputers, laptop computer computers, Minicomputers, Mainframe computers and Supercomputers size, speed, processing capabilities, price and how many users can use at the same time.Types of computersMicrocomputersLaptop computersMinicomputersMainframe computersSupercomputerSizeFits on deskSmall and conveyableSize in between microcomputers and mainframe computersPartial room of apparatusFull room of apparatusSpeedUp to 400 millionUp to 400 millionThousands to millionsMil lionsMillions to billionsProcessing capabilitiesWord processSurfing the webDatabase managementCalculationsEmail functionWord processSurfing the webDatabase managementCalculationsEmail functionWeb surfing sound out emailBasic productivity software(Daniel J.Gansle,2010)Processing data quickly and information storage, mostly using on airline system, back or insurance company.Process very large amounts of date, such as weather forecasting and government.Price of computersFrom $2500 up to $17000From $2500-up to $23000From $5000-$15000$300,000-several million dollarsSeveral million dollars and up concurrently connected usersFor individual use onlyFor individual use onlyTwo to four railyardHundred to thousandHundred to thousand