2.  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.

3.  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.

4.  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.

5.  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.

6.  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.

7.  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.

8.  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.

9.  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.

10.  Is a devices used to connect and convert data
from a digital line to a network or device.

11.  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.

12.  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.

13.  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.