Network types 000 024 in this lesson were going to

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Network Types 0:00-0:24
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In this lesson, we're going to spend some time looking at different ways we can classify computer networks. We're going to focus on classifying networks according to the roles that the individual hosts on that network fulfill. Specifically, we're going to discuss two different types of networks. First, we're going to look at peer-to-peer networks, and then we're going to look at client-server networks. Peer-to-Peer Network 0:25-1:47 Let's first look at a peer-to-peer network. In a peer-to-peer network, the individual hosts don't have a specific role. Hosts on a peer-to-peer network do two things at the same time; they both provide and consume network services. In a peer-to-peer network there could be many different computersystems, and each fulfill a variety of different networking roles. For example, this workstation righthere has a printer connected to it that is shared on the network, and this allows the other network hosts to send print jobs to it. In addition, this host over here has a huge hard disk drive installed, and all the other network hosts are allowed to access this shared hard disk drive. If we have a user over here, and she has a file that she needs to save, she can save it over the network connection to this system's hard disk drive. As you can see in this situation, these network hosts both provide and consume network services at the same time. These two hosts provide a network service. This one provides printing, and this one provides storage. At the same time, all these hosts consume services.For example, this host prints to this workstation's printer, while this workstation saves files to the hard drive on this workstation. They function as both a client and as a server at the same time. Advantages 1:48-2:22 Peer-to-peer networks have several different advantages. First of all, they're very easy to implement.You can create a peer-to-peer network using the existing workstations in your organization. There's no special software to buy. Once you've configured them in a peer-to-peer network, you can thenshare printers, and you can share storage devices on the network with minimal configuration. All you have to do is share your locally connected resources. Another advantage of peer-to-peer networks is the fact that they're relatively inexpensive to implement. With a peer-to-peer network, you just use your standard desktop operating system on each host; there's no special software to purchase and implement. Disadvantages 2:23-4:07 You might be asking, "If peer-to-peer networks are so inexpensive and so easy to set up, why don't we see more of them?" It's because peer-to-peer networks also have several drawbacks. For example, a peer-to-peer network is not scalable. The bigger it gets, the harder it is to manage and keep running. In addition, peer-to-peer networks are difficult to support, because they lack centralized controls. For example, suppose we have some shared storage on the hard drive in this particular workstation. The user who uses this workstation decides that they need more storage space
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  • Spring '14
  • Computer network, Local area network, Network topology, Metropolitan area network

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