The user who uses this workstation decides that they

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some shared storage on the hard drive in this particular workstation. The user who uses this workstation decides that they need more storage space freed up so they can save their files, so that user goes through that hard disk drive looking for things that they don't think are important, and they throw them away. When this happens, they could potentially delete the files belonging to the other network users. They have now lost their work, and this is not a good thing. In addition, suppose this workstation over here provides a shared printer that everybody in the network uses. The user who uses this workstation decides to take a day off of work, and before she leaves she locks her office door and turns her computer off. When this happens, no one in the office can print anymore. If this host over here is down, then users can't send print jobs to the printer. Another problem associated with peer-to-peer networks is the fact that data storage can end up being decentralized. For example, we could configure a shared folder on this system, on this system, and on this system. In this configuration, users may be saving sensitive company data in each of these shared folders on these different systems. In order to back up that critical company data, the system administrator has to visit each of these hosts individually, and back each one up every night.This represents a lot of work, and it also makes it difficult to keep this important data organized. Client-Server Network 4:08-5:19 There's a second type of computer network that you need to be familiar with that addresses a lot of the shortcomings of a peer-to-peer network. This is called a client-server network. Unlike a peer-to-peer network, in a client-server network the network hosts have specific roles assigned to them. For example, some specific hosts are assigned to be servers. A server provides network resources. The other hosts function as clients. A client does not provide network services, it instead consumes network services. For example, these client workstations here will not have any kind of shared storage. They also will not have any kind of shared printer attached to them. These services areprovided by the server. For example, suppose this server here has a humongous hard drive installed, and it also manages a shared network printer. It could also even have a web server running that provides web pages to these clients systems. In this scenario, the server provides the network resources and the clients simply use those resources. In order to set up a client-server network, different operating systems have to be installed on the various systems. Client Operating Systems 5:20-5:35 First of all, our client workstations need to use a desktop operating system that allows the end user to do their daily work. They need to be able to run desktop applications, and they also have to have some type of client software installed so they can connect to the server and use shared resources.
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