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Project The project of a local network

In designing a local network keep in mind that there are two models of network, called a Peer to Peer that other Client-Server .
The model is characterized Peer to Peer a set of PCs, each of which can share their resources, such as Hard Disk, CD-ROM, printer, scanner and so on, with the other computer.
You can therefore work in "local" that is, use only the resources of your computer, or work in "Network", that use shared resources from other stations, though obviously it has access.
This type of network, has several limitations, first of all, the number of stations that can be connected is quite low, but also where the company is quite small and therefore does not require a large number of PCs, keep that if the PC is password protected and the employee who uses it is absent, you can not access shared resources on that PC. Moreover, a proper sharing of resources requires more training for users.
The client-server model provides instead that there is a car with a processing capacity, memory and mass superior to the others. This computer is also called the Master. In extended networks quite close to the main server can provide the machines with specialized functions.

Example:
Some computers may be used for print management, application software, etc. .., in which case they will take the name of Print Server, Application Server, and so on.

All other computers, namely the customers, as well as take advantage of their local resources, all server resources, provided of course that they have permission. In fact, the authorization is assigned to users who are connected, and not the client. Managing Client-Server makes it possible to adequately protect not only all the server resources, but also the local resources of each machine, inhibiting access to particular resources to specific users.


Example:
to protect the server or multiple computers, you can block access to floppy disk or operating system files in order to prevent tampering or infection, but you can also avoid the banal, the desktop is changed.


the different clients can access not only to the server simultaneously, but also to the same resources, working on files and shared printers. If the user data are centralized, that is stored in folders of the server, then you can make a centralized backup, otherwise each user is responsible for backing up their data, which must be run on any PC. The drawback of this system could be a possible server crash. However, the major software house offering to support the primary server network, a controller support, as it were a Server Backup , which comes into operation automatically in case of malfunction of the primary server.