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Now which physical components make up a network there are different types of devices that can be part
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of a network.
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A network could be as simple as two PCs connected to each other using a cable or as complex as thousands
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of devices that connect through different types of media including copper fiber and wireless.
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So let's look at some of the components that you'll find in a typical network today.
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The first one is endpoints.
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These include devices such as PCs or computers printers tablets servers phones and other devices that
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users use.
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In other words these are devices that either retrieve or provide information they are used to send and
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retrieve data as an example of PC or iPad could be used to connect to a web server to retrieve bank
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account information.
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Into connections these are the various components that connect the devices in a network.
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They provide a means for data to travel from one point to another into connections include components
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such as network interface cards or nix.
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These translate to computer data into a format that can be transmitted over a wire network interface
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card is a device that you plug a network cable into network media such as cables or wireless media provide
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a means by which signals are transmitted from one network device to another electrical signals are used
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in copper as an example light is used on fiber connections and the A is used in wireless transmissions
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connect connectors provide connection points for media.
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The most common type of connector is the plug on the end of a network cable which is an RJ 45 connector.
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This is very similar to an analog phone connector will be discussing connections and a lot more detail
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throughout the course of that kind of device that you'll typically encounter is switches.
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These are devices that endpoints such as PCs file servers and printers typically connect to.
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They provide intelligent switching of data within a local area network routers connect and networks
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and intelligently choose the best paths between networks.
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Their main function is to run traffic from one network to another.
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This could be as simple as connecting your home network to the internet your home network may be running
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wireless so that your iPad or iPhone can connect to the wireless network but when connecting to the
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Internet various technologies could be used including cable DSL copper ether net or fiber connections
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wireless LAN devices allow wireless devices such as computers printers tablets such as iPads to connect
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to a wireless network a device called a wireless access point is typically connected back to a wide
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infrastructure so that your traffic from your wireless device such as an iPad can be sent to a physical
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server will now discuss the characteristics of a network.
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When you purchase a new PC or a new phone one of the things that you're going to look at is the specifications
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of that device.
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So on a PC as an example how much memory does the PC have.
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What's the you of the PC What operating system does it come with.
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There are various specifications which we can then use to compare one PC with another.
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You might do the same with a phone so you'd look at the characteristics or specifications of a phone
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and compare that to another phone on the same way.
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Networks have characteristics which can be used to understand how a network operates a computer network
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has a list of characteristics which can help you describe its performance and structure understanding
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each of these characteristics is important.
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If you want to understand how well a network is designed and how you could improve the performance of
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a network so the first term to understand is topology networks have both a physical and logical topology.
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The physical topology is the actual physical arrangement of the components of a network such as its
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cables network devices and end points.
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The logical topology however may be very different to the physical topology.
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The logical topology describes the path over which data is transferred in a network.
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You could also look at the physical topology describing how the network devices are actually interconnected
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with one another using cables and wires.
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A logical topology however describes how the network devices appear to network users.
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As an example you may have a one switch with 24 users connected to that switch.
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That's a physical topology but when you use a V lands or virtual local area networks the logical topology
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changes and villans allow you to create multiple virtual networks running on that one switch which changes
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the flow of data from a user's point of view.
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