wired communication involves the transfer of data through a cable there are many types of wired communications two of the most prominent ones are usb and ethernet let's take a look at both of them the usb is one of the most common types of wired connections it can be used for many different purposes usbs have gone through many revisions to make sure it is up to date with technology ethernet this connects a device to a wired network you can connect your laptop to your wi-fi network through an ethernet cable an ethernet cable loses its quality after about a hundred meters there are many different types of wireless communications let's take a look at some of them wi-fi wi-fi is found almost everywhere these days you can use wi-fi to connect to a network which is most probably connected to the internet bluetooth bluetooth only allows devices to connect over a short distance these are often used to transfer files but cannot carry as much as wifi bluetooth is often used to listen to music 3g and 4g this is a mobile broadband connection that provides internet access to mobile device g stands for generation at this current time 5g is the newest generation which means a higher speed and more availability of signal than the previous generations infrared communication there are a lot of disadvantages when it comes to ir signals they cannot carry much data they need a clear line of sight since the signal travels in a straight line and it is affected by sunlight therefore infrared signals are not used for anything big it's mostly used for remote control devices near field communication this uses radio frequency identification chips it is often found in smartphones travel cards and some payment cards as well now let's compare the wired and wireless connections filed communication has a small number of cables so it is cheap there's a risk of tripping over cables it is faster than wireless connections it's in it's affected by interference but very less it is not portable as it can't go past 100 meters it can look untidy if not kept properly and it is secure wireless connections have no need to buy cables and the router is priced at a medium price there are no safety risks as the wha is confirmed there's no problem for radiation slower than wired it is affected by interference it's portable within a certain range it is tidy and it is easy to intercept you