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Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
Communication devices
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Communication devices

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  • 1.  Is a device which is used to control the flow of data to and from a computer.  Usually exchange data from a modem or other serial cables.
  • 2.  Is often modems  Is used to create a session, maintain it, and terminate between two devices to transfer data.  It also coverts signals for transmission.
  • 3.  Is a mobile phone standard by ITU, one feature is to connect to mobile broadband. This allows the user to connect to the internet to transfer data.  Has a maximum download speed of 7.2Mb and a download speed of around 2Mb  It works by phone towers send signal to each other and then the closest one to the phone send it to that phone.
  • 4.  Is a newer version of 3G mobile standard by ITU  It allows faster speeds than 3G meaning things that were difficult/ slow to use like streaming video will be easier on 4G.  Has a download speed of around 50 Mb and upload speed of around 14 Mb  However it only works for new phones and where there are 4G phone towers.
  • 5.  Can allow users to call and send text to other people with mobile phones.  It can also communicate with Bluetooth and if it has access to the internet, depending on the phone it can send E-mail, access social networks and download data like pictures and videos.
  • 6.  Is a portable computer that can connect wirelessly to routers, or hotspots to access internet or transfer data.  It can also connect and transfer data to other devices using Bluetooth.
  • 7.  Tablets are just like laptops, they both communicate the same ways, they are both portable, the only major differences tablets don’t have a built in keyboard and touchpad, might have a connectable one, it’s touch screen and has less memory.  Tablets are mostly used on the go.
  • 8.  Speeds of around 70 kilobits per second  Is used to transfer data mostly used on 2G phones, with this the phone must stay on and can send data during calls.  This can be added to new phones but is slow compared to 3G and 4G.
  • 9.  Is a devices used to connect and convert data from a digital line to a network or device.
  • 10.  Is where signal/data is sent from one device to another but can only go in one direction meaning data can’t be sent the same way it came.  For example aTV stations transmits data to the receive your house to view the channel but nothing is sent back to theTV station.
  • 11.  Half duplex is where you can send and receive data from devices at any time, however both devices can’t send them at the same time.
  • 12.  Full duplex is just like half duplex where two devices can send data but full duplex allows both devices to send at the same time without any collisions.  This is because the data link layer ensures both are able to send and receive data at the same time.

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