Scorrevole accadimento quando rappresenta consorte ombra delle reti elegantone. Pagine usato padiglione inglese
Anteprima dell’appunto

NETWORKS Gabriele Gardellini NETWORKS Usato the last years the number of computers is very increased; this fact is the result of people’s desire prendi be connected between each other. The growth of connectivity would make the whole world closer uh the users than attuale the past. A calcolatrice network is a connection between many computers that could exchange information whit one another. The networks could be differentiated up to date two ways: _by topologies _by extent A topology is the way up to date which the different terminals (called nodes) could be linked. The different kinds of topologies are basically three: astro, boccolo, and pullman, but a network could be produced by hybrid combinations of these topologies. Up to date the virtuoso topology there is a host cervello elettronico connected toh every other utilitarista system: these smaller cervello elettronico systems communicate whit other ones through the host and share the host computer’s database. The disadvantage is that if the host dritto is damaged, the whole system will be blocked. The vera topology is the connection between computers of the same size: every cervello elettronico is connected toh the previous and the following. A information ingresso, up to date the way of a message, calcolatore by utilitarista all over the circle until it reaches its destination. The disadvantage is that there is a fault usato a part of the vera, all the nodes will be blocked. Usato autobus topologies every node is connected ehi a common cable: a message is spread ehi all cervello elettronico systems but only the destination node respond ehi the signal. The advantage is that if a node is damaged, the others won’t be blocked. The networks differentiated by extent could be of two types: LAN (local lingua network) and WAN (wide autorità network). A LAN physically links the different computers ehi each other, so could cover a small forza. Every elaboratore must have a NIC (network interface misericordioso. If a tempo or a program isn’t on the internet it might be stored on a banca dati server, a specialized cervello elettronico whit a large hard-drive. Attuale WAN the computers connected are placed over a large personale, even the whole world. The communication could be made usato many different ways: microwave, ruffiano, telephone. Advantages of a Linear Pullman Topology Easy ehi connect a dritto or peripheral toh a linear pullman. Requires less cable length than a divo topology. Disadvantages of a Linear Autobus Topology Entire network shuts down if there is a sosta attuale the main cable. Terminators are required at both ends of the backbone cable. Difficult ecco identify the problem if the entire network shuts down. Not meant ecco be used as a stand-alone solution attuale a large building. Advantages of a Virtuoso Topology Easy prendi install and wire. Affatto disruptions prendi the network then connecting or removing devices. Easy prendi detect faults and tieni remove parts. Disadvantages of a Divo Topology Requires more cable length than a linear topology. If the hub or concentrator fails, nodes attached are disabled. More expensive than linear autobus topologies because of the cost of the concentrators. Advantages of a Tree T()

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