The scope of IoT is increasing as - the cost of technology decreases as more Wi-Fi enabled devices are developed, An example of IoT impact on lifestyle is - people using smartphones and an app to control heating when they are away from home, The development of wireless and optical fibre communications technology - has led to an increase in the use of networks, such as mobile phone networks, Modern devices are built with - a built-in wireless adapter which allows the user to connect to a Wi-Fi network, Wi-Fi connections are made possible by - radio waves and a wireless router, Wi-Fi connections do not need - network cables, Home Wi-Fi networks need to be - protected by using a password, A disadvantage of Wi-Fi is - signal strength varies depending on distance from wireless router, Wi-Fi data can be transferred at rates of - up to 54Mbps, Bluetooth uses - short range wireless technology, Both Wi-Fi and bluetooth use - radio signals to transmit data, To use bluetooth, devices need to be - "paired" or synchronised, Unlike Wi-Fi, bluetooth does not require a - router, Devices need to be close together - to use bluetooth technology, Bluetooth technology is cheaper than - Wi-Fi because the devices communicate directly with each other and no router or third party provider is required, Examples of bluetooth technology are - a wireless mouse, a hands-free headset or connecting a digital camera to a printer, Optical fibre technology uses - very thin strands of glass to send data, Optical fibre has - very fast transmission rates and transmits data as pulses of light, An alternative to optical fibre cables is - copper, An advantage of using optical fibre instead of copper is - signals and data are more secure and at less risk of being hacked, A larger capacity of data can be sent via optical fibre over a period of time because of - the greater bandwidth, A major drawback of optical fibre is - that it is very expensive, If data is travelling over longer distances, optical fibre requires - the use of repeaters, Repeaters protect the integrity - of the data, Repeaters are very - expensive, Optical fibre consists of a bundle of - glass strands and each strand carries one data signal, allowing many data signals to be sent at once, A router is a - hardware device that connects a number of networks together, by either cable or wireless, to allow for data transmission, 4G mobile phone technology is capable of - high-speed data access and high quality video streaming using wireless technology on a global scale, 5G mobile phone technology is - more reliable and has greater speeds than 4G, 5G mobile phone technology fully supports the - WWW, with little or no limitations e.g. users can watch tv programmes on mobiles in HD format,

Network Technologies Part 3

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