Network Devices: Bluetooth, WiFi and Network Adapters
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Video Transcription
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>> Hey Cybrarians, welcome back to
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the Linux+ Course here at Cybrary.
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I'm your instructor Rob Goelz and in
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today's lesson we're going to
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be discussing network devices.
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Upon completion of today's lesson,
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you are going to be able to identify
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the network communication devices
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>> that are going to be on
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>> the exam and we're going to talk about how
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Bluetooth and Wi-Fi are configured.
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The Linux+ exam is focused on
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three types of network communication devices,
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and those are Ethernet adapters,
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Wi-Fi adapters, and Bluetooth adapters.
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Ethernet adapters are more often just
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called network adapters or network cards,
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are a type of host bus adapter,
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which is often abbreviated as just HBA.
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These ones are used to
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connect systems up to a wired network,
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and they use what is called the RJ45 cable standard.
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Linux supports both onboard Ethernet adapters and
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add-on adapter cards like
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the ones pictured here on the right-hand side,
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and we can see the port is torn,
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if you've ever plugged in a network cable,
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that's the port you're going to be used to seeing,
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it looks like an overgrown phone cable port.
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We're not going to cover
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configuring Ethernet adapters here,
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just because we already talked about that in Module 3.
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Wi-Fi is the primary network connection
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means on laptops and pretty much
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what a lot of people use nowadays.
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It's less likely to be found in a server environment,
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but we can sometimes see that
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on desktops and workstations,
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it just depends on the network
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that you have set up at home,
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whether or not you have the ability
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to run cables all over the place.
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Iwconfig is what we use to configure wireless devices,
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and the Iwlist command is used
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>> to find wireless networks.
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>> An example, wireless connection
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>> might look something like
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>> iwconfig to see any available wireless interfaces,
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and then from there we can use
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iwlist with the interface name
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and then scan to find available Wi-Fi networks.
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Once we find those networks,
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we can use iwconfig on
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the interface to see the interface status,
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and then specify we want
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that interface to connect to the Wi-Fi name,
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by doing iwconfig interface,
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ESSID, and then the Wi-Fi name.
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Once it's all set up, we can
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do iwconfig interface commit,
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and it will apply all the changes and connect us to
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the wireless network. Now Bluetooth.
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Bluetooth was designed to replace serial or
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RS232 with wireless communication.
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A Bluetooth transmitter can
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>> connect up to seven devices,
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>> and the devices and transmitters
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operate on what's called a piconet.
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Piconet is sometimes more commonly referred to
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as a personal area network or PAN.
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Bluetooth is installed Linux with
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the blues package or bluesy package,
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and it provides both bluetoothctl and the hcitool.
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To set up a Bluetooth, for example,
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you might use bluetoothctl list,
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which is going to list
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the available devices and controllers.
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You can do bluetoothctl scan
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on that's going to show any unpaired devices.
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Then hcitool scan to
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find the MAC address
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of the device you want to connect to.
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Then finally, you use bluetoothctl
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pair the controller MAC address to pair the device.
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But with that, we reach the end of this lesson.
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In this lesson we covered
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network communication devices that are going to be on
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Linux+ exam and a little bit of an overview
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about how Bluetooth and Wi-Fi are configured.
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Thanks so much for being here and I look
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forward to seeing you in the next lesson.
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