AD HOC Networks Traditional Networks are made up of ____ PCs, routers and other devices that are connected using cables and wires. These systems can be difficult to change because they are fairly fixed, for example cabling network nodes are often hardwired into buildings during construction. Modern technologies make it possible for organisations to work increasingly flexibly, allowing devices to be ____ as needed. Connecting devices and systems in this way is called an ad hoc ____. An ad hoc network is a type of wireless network that does not rely on fixed hardware such as routers in wired networks. Benefits of ad hoc networks They are ____, which means that more devices can be added at any time. They are ____, which means they can be temporarily set up at any time and in any location. They require limited setup. Devices can ____ instantly once a connection is established. Drawbacks of ad hoc networks They are less ____. This is because they are more ____ and therefore are more likely to be accessed by attackers. They have a ____ speed. There is a limit to the amount of ____ that can travel at one time. They often have no single ____ that has overall control, which means that the network can become unorganised. Key features of ad hoc networks Personal Area Networks (PANs): - Connects ____ devices that are nearby to create a ____ network - Allows exchange of files, images, documents, etc - Devices typically use Wi-Fi or ____ - Needs to pair devices using PINs before data can be ____ - Limited ____ - Use of Bluetooth sometimes called a piconet Key features of ad hoc networks Open Wi-Fi: - Availability of Wi-Fi connections in ____ places, e.g. cafes, parks, train stations, coffee shops, etc. - Allows user to ____ connect - Does not, generally, require ____ - May not be ____ so communications may not be ____ - Allows more flexible working patterns, such as ____ working (working outside the office) Key features of ad hoc networks Tethering or personal hotspots: - Connects a device with a network connection to one without - Transfers ____ to and from the network using the device that has been tethered - Connects a notebook to a mobile phone with an internet connection which is a popular use of this technique - Uses a ____ tether (usually USB) or Wi-Fi to create a ____ hotspot

Communication Technologies

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