Hello everyone. In this lesson we're going to talk about the
difference between bluetooth and wifi. Now both of these are radio frequency technologies
that are used for wirelessly connecting electronic devices. And certain devices will have both bluetooth
and wifi functionality built into them. Now both of these do have certain things
in common, but there are also some differences. So let s first talk about bluetooth. Now bluetooth was created to get rid of the
hassle of dealing with wires and cables. Bluetooth is a low-power, wireless technology
that uses a short-range radio that provides a way to connect nearby devices to each other. Bluetooth devices will have a computer chip
inside of them that will broadcast a signal so that other bluetooth devices can connect
to them, which is known as pairing. And when the devices are paired, they will then
be able to exchange information between them. Now the most common use for bluetooth is for wireless audio streaming. Such as pairing your cell phone to wireless earbuds, or an external
speaker. It can also be used for pairing headphones
to a TV or pairing a wireless keyboard and mouse to a tablet or computer. But one of the most common uses is pairing
your cell phone to your car's audio system. Which enables hands-free use when you're on the
phone while driving. The range of bluetooth is approximately 30
feet or 10 meters. Now let s talk about wifi. Now wifi is a wireless technology that uses
radio waves that allows devices such as desktop computers, laptops, tablets, and cell phones
to be able to connect wirelessly to the internet. And the most common way that wifi devices access
the internet is by connecting to a wifi router. Wifi routers will have a connection to an
internet service provider that will broadcast a wifi signal so that nearby devices can connect
to the signal and grant them internet access. And in addition to internet access, these devices
can be configured to exchange information between them by creating a network. And depending upon the surrounding environment, wifi has a range anywhere from 100 - 300 feet. So what are the differences between bluetooth
and wifi? Well, the main difference is that bluetooth
is for connecting devices to each other to exchange data. And wifi is used to connect devices to the
internet. And another difference is the range and speed. Bluetooth has a slower transfer rate and a
shorter range and the reason for this, is power. Bluetooth uses less power than wifi. So even
though it sacrifices in range and speed, it also has
an advantage with longer battery life with less frequent
charging which allows bluetooth devices to be manufactured
in a smaller size that doesn't require large batteries. But wifi on the other hand, is faster than bluetooth and has an approximate 10x longer range. Now both bluetooth and wifi operate at 2.4 GHz. But the thing is, a lot of other devices also operate at 2.4 GHz, such as
microwaves and cordless phones and this could interfere with wireless signals. But bluetooth is less vulnerable to interference
because it uses a technology called Frequency Hopping Spread Spectrum, which uses a method
of transmitting signals in a pattern that only the
transmitting and receiving devices know. The signal hops between 79 different channels
and changes channels 1,600 times per second. Which makes bluetooth highly resistant to
interference when compared to wifi. And bluetooth devices are also simpler to connect
to because there's no password required. So for example, let's say you wanted to pair
bluetooth earbuds to your cell phone. You would just power on the earbuds
and then turn on bluetooth on your cell phone. Then in your device settings on your phone, you just click on earbuds when they appear and then you're connected. So thank you everyone for watching this video on the difference between bluetooth and wifi. Please subscribe and I will see you in the next video.
