Nowadays, there have various kinds network topologies with different attribute, price and level, it was very important to choose the right network. Now we are going to discuss four basic network topologies : Bus, Wedding ring, Star and Mesh.
Let's discuss bus topologies first, bus network topologies is an individual cable designed to use to hook up to different details between network, as it only have one channel to aid the bus network for communication, so the total capacity will send to all the tips averagely. Whenever a point want to send instructions to another point, it will announce a note to all or any the things thru wire and all the points will dsicover it but only the vacation spot point will receive and go back the concept to the sender point, other items won't give any response.
Bus network topologies are cheaper than other network topologies since it use less cable and materie as well as the installation is simpler than other topologies. But because it is a single cable television, when there have many things connect to the device, it will decelerate the transmission quickness and the full total capacity.
On the other hands, once the network have problem, it cost many times to repair it as you have to check on all the cable television connection to learn the problems. Also in a bus topology, once an individual connection failure, it will stop the passing between all things.
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Second topologies which we will discuss is Wedding ring topology.
In a engagement ring network, each apparatus linked to two users for communication goal. It looks like a group and the meaning maneuver around the circle to each point use solitary course. Each node hook up to its cable to the Medium Connection Unit (MAU). Wedding ring network topology is straightforward to set up and reconfigure and also easy to add new node as only two contacts need changes.
However, Ring network is not too convenience for the user as the data have to feed all the details before addressing the destination. For instance, if one network have six user, when the A pc want to send note to F computer, it have to feed B, C, D, E computer and then to F. If one network failure, entire network will disable since it only have single pathway to transmit the info.
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The third network topology is Legend.
Star network is one of the most typical computer network topologies. It includes a central interconnection point call hub or concentrator (Bruce A Hallberg 2005) and it'll radiate to other items. The attribute of Celebrity network is the hub or concentrator are a central union to provide different course for signal distribute to any two sites. Data on superstar network will send the concept 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 interconnection stoppage, only 1 node will eventually lose the connection out of this site and it won't be affect to other networks. Alternatively, it will be easy to learn the problem as all network is obey to hub, so after the network out of service, mostly it must be some problem with the hub and the condition can be fix quickly rather than verifying all the points. Furthermore, as hub is control everything included add or remove devices, that means Star network is straightforward to install. If you want to then add new devices to the network, just need to connect the cable television to hub and other computer will detect the devices and can use it. It save lots times to install the devices to all or any computers individually in the network. In addition, hub may also be act as a backup document, once the network is not work, you can proceed to another computer and using the info from hub.
Although celebrity network is more stable than other network topology, but superstar network is more expensive as it needs more wires to support the network. And because it is fully follow to hub, once there have many nodes, the network maybe slow down.
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Last network topology we have to discuss is Mesh.
Mesh network is a network where all the nodes linked to each other with various ways, maybe single hop or multiple hops.
In a mesh network, if one node or cable television have problem appear, there will have another way to talk to other node, it will not be halt the whole network. Mesh network will also default the short way automatically while the message shifting the mesh network, which 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 interconnection problem as there have many possible patterns that can use. When one node inability to connect, mesh network will find another way to attain the destination easily.
Mesh network independent to two similar types: Full mesh and Partial mesh.
Full mesh which every node will connect to the other person therefore the network can provide best redundancy function. Once one of the nodes breakdowns, connection between the networks will be better under full mesh network because there have more possible path to reach to destination. Because of more wire connections need, so full mesh network is expensive than incomplete mesh network and it may also impact the set up procedure because of the complexity.
For the cost-effective reasons, a few of the company will choose to use the incomplete mesh network. In partial mesh network, devices are only connects to a subsection node rather than all nodes. This might affect the entire network once the interconnection have problem since it only have a couple of ways to attain the vacation spot point. Even though the communication between your networks is not as strong as full mesh network, however the cost is cheaper than it, so nowadays partial mesh network is more popular than full mesh network.
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Physical communication multimedia is a avenue that can let the digital data move from one computer to some other. And now will going to spell it out different physical communication media, for example Twisted-Pair cable television, Coaxial Cable television and Fiber-optic cable.
The first cable connection we will speak about is Twisted-Pair cable tv.
Twisted-pair cable which is often subdivided as unshielded twisted match (UTP) and shielded twisted set (STP) (Bruce A Hallberg 2005). Both UTP and STP have eight distinct brown metal wiring and cover by insulate material. Besides, each couple of wire connections was wound to one another.
UTP and STP not only have similar structure and also have similar transmission technology. Despite the fact that STP has a better protection software and quality than UTP, but it cost more costly rather than easy to install.
Using Twisted-pair cable's advantages is its size is smaller than others so that it will easy to set up and it cost cheaper than Coaxial wire and Fiber-optic cable television.
On the other side, the transmission sign is shorter than other communication marketing and the coverage area is merely 100 meters.
Another cable we are going to discuss is Coaxial Cable tv.
Coaxial cable is cover by 4 tiers: copper wire, insulation, copper mesh and cable jacket. Coaxial cable tv can certainly help 10-100 Mbps and it coverage 500 meters. (Scribd n. d. )
The benefit of Coaxial Cable is it can run for an extended distance between network but use less electricity. The cost of Coaxial cable television is cheaper than Fiber-optic wire and because of computer use for many years, so it could be more popular.
However, how big is Coaxial Cable much less thin as Twisted-pair cable tv, so it will be difficult to set up and relatively the setup fee will be higher than Twisted-pair cable tv.
The previous one we have to discuss is Fiber-Optic cable television.
Fiber-Optic cable is manufactured by narrow key and insulates material. It use the equipment and lighting to transmission the time frame. A lot of the corporate network use Fiber-optic cable as back bones to connect different network.
The benefit of Fiber-optic cable is it has an increased data speed and the higher bandwidth is wonderful for future development.
But Fiber-optic cable is not quite versatile as it cannot curve, so that it could be more difficult to set up and the price is the most expensive one.
Different computer systems have its different purpose, we are going to compare Microcomputers, Laptop computers, Minicomputers, Mainframe computers and Supercomputers' size, speed, processing capacities, price and just how many users may use at the same time.
Types of computers
Fits on desk
Small and conveyable
Size among microcomputers and mainframe computers
Partial room of apparatus
Full room of apparatus
Up to 400 million
Up to 400 million
Thousands to millions
Millions to billions
Surfing the web
Surfing the web
Basic productivity software
(Daniel J. Gansle, 2010)
Processing data quickly and information storage area, generally using on airline system, back or insurance provider.
Process very large amounts of time frame, such as weather forecasting and federal government.
Price of computers
From $2500 up to $17000
From $2500-up to $23000
several million dollars
Several million us dollars and up
Simultaneously connected users
For specific use only
For individual use only
Two to four thousand
Hundred to thousand
Hundred to thousand
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