Ad hoc networks are temporary networks with two or more computing devices., An ad hoc network could be used between two laptops to connect them together so they can share., Ad hoc networks are normally less reliable than traditional ones. , Poor signal can reduce access to the internet. Devices can disconnect if they use Bluetooth and are too far away. Many devices sharing a connection can make it slow., Open Wi-Fi is offered, often for free, in many places such as hotels, trains and airports., If you don’t need a password to connect to the Wi-Fi, then it doesn’t use encryption and is therefore very insecure., Open Wi-Fi sends all data from your device to the access point in plain-text. This means that a hacker can view sensitive data such as passwords to services., You should only connect to Wi-Fi that uses WPA2 encryption., You could connect to a virtual private network (VPN) which encrypts everything between you and the VPN provider., Personal hotspots allow you to connect devices to either a smartphone or small pocket device., Connections are made either Wi-Fi or bluetooth., Connecting to a hotspot is known as tethering., Personal area networks (PANs) connect computers or devices together using Bluetooth or Wi-Fi., For instance, a phone could connect to an in car entertainment system to play music and make hands free phone calls., For communication technologies, the most important infrastructure today is the method of connecting to the Internet., The following methods can be used: cables (copper or fibre), mobile and satellite., Most UK homes and businesses connect to the Internet using a copper cable., Fibre connections often only provide fibre to the green cabinet in the street. This is known as Fibre To The Cabinet (FTTC)., The country is divided into areas called cells which each have a mobile phone transmitter. If no transmitter is present in the cell then there will be no signal. This is called a blackspot.,

Learning Aim A - Communication Technologies

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