0:00:06.609,0:00:12.230
This lesson is all about the internet. The[br]internet is a very busy place and similar

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to this busy road. Messages like cars are[br]zooming along to get to their destinations.

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Messages move through the internet very quickly.[br]Acting out how the internet works will help

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you understand what's happening when you use[br]the internet. You'll learn how messages get

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from your computer to a favorite website or[br]from a friend to an email inbox. Just like

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it's easier to navigate busy roads when you[br]know the roads and can read the signs, traveling

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the internet is not so complicated when you[br]know what goes on behind the scenes. Sending

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messages on the internet is a little bit like[br]sending messages in the mail but with a few

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differences. I'm here at Google.com. The IP[br]address for this website is this number. You

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can think of an IP address as your return[br]address in the mail. Let's imagine that I

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want to send a message in the mail to someone[br]in the office down the there. Do you see URL

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and the IP address on that door? I've written[br]this message and hit send. Unlike the Postal

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Service, the first thing that happens is that[br]the internet breaks the message into smaller

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parts so it can be sent more easily. These[br]small parts are called packets. Each packet

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of the message is delivered to the destination[br]one at a time. These packets are all put together

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in the right order so that the receiver can[br]read the message correctly. Of course, there

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are many more things to learn about how the[br]internet works but this is a great start.

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You're on your way to becoming a savvy internet[br]user! Be sure to tell your family and friends

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what you've learned! My name is Amanda Camp[br]and I'm a software engineer at Google. I work

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on a team that works on a backend server that[br]stores profiles and contacts. In my job, we

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think a lot about how contacts can be sent[br]to other devices, such as your phone. Most

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people have a lot of contacts, you might have[br]say, 1000 contacts and we don't want to send

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all of those contacts at once to your phone[br]because it's too large of a message. Similar

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to the way the internet breaks large messages[br]down into packets, we use a concept called

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paging where we might only send your phone[br]100 contacts at a time and let your phone

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respond to us and ask for the next 100. The[br]most exciting thing about software is the

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fact that it can impact the entire world.[br]I first learned to program when I was about

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nineteen. I think I was already a sophomore[br]or a junior in college. The first program

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I remember writing is something that converted[br]Celsius to Fahrenheit. I like programming

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because I like helping people. I can write[br]programs at Google that help people all over

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the world and that's really mind-boggling[br]and exciting.