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whenever you click on an enticing Link in a web browser the website you're

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looking at knows to send whatever the link contains to your computer and not

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your neighbors because your computer sends its IP address kind of like a

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return address on an envelope but as it turns out IP addresses only get you as

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far as the modem you have in your house and these days most of us have tons of

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things connected to our routers especially wirelessly phones laptops

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tablets computers other people's phones

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consoles CH casts oh and they're all

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connected nearly all the freaking time

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you don't really want to be thinking about it so how does your home networking equipment know to send those

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questionable videos to you and not your

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parents sitting in the Next Room well each device on your network has

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something called a Mac Address yes even the PCS Mac in this case stands for

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media access control it identifies which

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device is which on your local network so

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here's how they work when data arrives at your home from the worldwide internet

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your router needs to decide which device to send that data to it does this by

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keeping track of the Mac addresses of all the devices connected to it then

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assigning what's called a private IP address usually starting with 1

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192.168 to every device this is also why

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you usually punch in those numbers to access your router's control panel

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through your browser this is very different from a public IP which is what

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the rest of the internet sees as being your IP address for your entire home

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network and what comes up when you type what's my IP address into Google your

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router keeps track of outbound requests such as when you click on a link so when

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the data you want arrives at your router it attaches the correct private IP

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address to the data packets ensuring that they got to your computer or device

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since all those private IP correspond to the correct Mac Address now this might

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understandably seem a little redundant since your computer now has both a

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private IP and a Mac Address that can both individually identify it but in

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reality you need both since although both the public and private IPS stay the

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same throughout this process the Mac addresses on the data packets are

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constantly being changed they only tell the data where to go for its next hop

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when your data gets to the next device the Mac Address has changed in order to

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tell it where to go well next since your data might go through numerous servers

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and routers before it finally gets to your device Mac Address information is

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crucial even though you have a private IP another upside of Mac addresses is

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that normally they always stay the same with many devices having their Mac

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addresses hardcoded into the firmware at the factory making it easy to spot a

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malfunctioning device on the network if you're trying to troubleshoot and if you

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want to protect your network by making it so that only devices that you approve

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can connect many routers use Mac addresses to restrict access to known

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devices very useful if you're worried someone might try to steal your Wi-Fi

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password or even plug in physically isps

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also use predefined Mac addresses to make it easy to provide you with the

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service you paid for so that your neighbor isn't the one getting that

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expensive gigabit connection that you're shelling out money for every month of

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course they also use these to block access if you aren't paying your bills

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however so type that as you will it is possible to spoof a Mac Address however

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and you might want to if you're concerned about your privacy on a public

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Wi-Fi connection or you connect a new device to your network that your ISP

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might not recognize but be for warned that this might not make your ISP happy

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depending on who they are actually who am I kidding it probably doesn't depend

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at all does it racing against the clock as a freelancer challenging whatever

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you're doing yes I'm sure but with the growth of the internet there's never

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been more opportunities for the self-employed to meet this need

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freshbooks is excited to announce the new version of their allnew Cloud

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and invoices and all that kind of stuff on your own has been redesigned for the

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tequi and enter Techquickie in the how did you hear about a section all right

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guys thanks for watching like it if you liked it dislike it if you disliked it get subscribed let us know in the

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comments down below if there's other things you would like us to check out on techwiki check out Channel Super Fun I

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haven't been on there in forever but there is a new like battle couch video

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coming at some point that I will be in so that's pretty cool and I'll see you

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next time I'm going to go play with PlayStation VR for an LTT video which

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you'll also see in the future