第一章：欢迎来到数字世界 | Welcome to the Digital World

想象一下，今天是周末，阳光明媚，小明睁开眼睛，看了看床头的电子闹钟——早上七点半。他伸了个懒腰，心里想着今天要做什么。

“妈妈，我可以用平板电脑玩一会儿游戏吗？”小明问道。

“可以呀，但是只能玩半小时哦。”妈妈在厨房里回答。

小明开心地拿起平板电脑，打开了他最喜欢的赛车游戏。屏幕上的小车飞快地穿梭在各种赛道上，引擎声嗡嗡作响。就在他即将冲过终点线的时候，突然弹出一条消息：“恭喜你！你是第一百万位访客！点击领取超级皮肤！”

小明兴奋地点了进去……

Imagine this: It's a weekend morning, sunny and bright. Xiaoming opens his eyes, glances at the digital clock on his nightstand—seven-thirty in the morning. He stretches and thinks about what to do today.

"Mom, can I play games on the tablet for a while?" Xiaoming asks.

"Sure, but only for half an hour, okay?" Mom replies from the kitchen.

Excited, Xiaoming grabs his tablet and opens his favorite racing game. Cars zoom across the track on the screen, engines roaring. Just as he's about to cross the finish line, a message pops up: "Congratulations! You're our one-millionth visitor! Click here to claim your super skin!"

Xiaoming excitedly taps on it...

就在这时，平板电脑突然变得很慢，屏幕上出现了很多奇怪的广告。小明不知道发生了什么，有点害怕，赶紧关掉了游戏。

At that very moment, the tablet suddenly becomes very slow, and strange ads fill the screen. Xiaoming doesn't know what's happening. He feels scared and quickly closes the game.

“妈妈！妈妈！我的平板电脑好像坏掉了！”小明着急地喊道。

"Mom! Mom! My tablet seems to be broken!" Xiaoming shouts anxiously.

妈妈走过来，看了看平板电脑，说：“没事，这不是坏掉了。小明，你知道刚才发生了什么吗？其实这是一个小小的网络安全故事。”

Mom walks over, looks at the tablet, and says: "Don't worry, it's not broken. Xiaoming, do you know what just happened? Actually, this is a little cybersecurity story."

就这样，小明开始了他的网络安全探险之旅。而你，亲爱的小读者，也将和小明一起，踏上这段神奇的数字世界冒险！

And so, Xiaoming began his cybersecurity adventure. And you, dear reader, will join Xiaoming on this magical journey through the digital world!

我们的神奇数字世界 | Our Magical Digital World

你有没有想过，我们每天生活的这个世界，其实有两个部分？一个是我们看得见、摸得着的物理世界——有蓝天白云、有花草树木、有我们的家、学校和游乐场。而另一个呢？它看不见、摸不着，但却真实存在，那就是数字世界，也叫做网络空间，或者互联网世界。

Have you ever wondered that the world we live in every day actually has two parts? One is the physical world we can see and touch—with blue skies and white clouds, flowers and trees, our homes, schools, and playgrounds. But the other part? We can't see it or touch it, yet it really exists. That's the digital world, also called cyberspace, or the internet world.

就像童话故事里的魔法王国一样，数字世界也是一个神奇的地方。在这个世界里，我们可以和远在千里之外的朋友聊天，可以看到世界各地的美景，可以学习无穷无尽的知识，可以玩各种各样有趣的游戏。这个世界没有边界，没有国界，只要你有一台能联网的设备，就能进入这个神奇的世界。

Just like the magical kingdoms in fairy tales, the digital world is also a wonderful place. In this world, we can chat with friends who are thousands of miles away, see beautiful scenery from around the world, learn endless knowledge, and play all kinds of fun games. This world has no boundaries or borders—as long as you have a device that can connect to the internet, you can enter this magical world.

什么是互联网？| What is the Internet?

互联网，英文叫 Internet，你可以把它想象成一条超级神奇的公路。不是普通的水泥路，也不是高速公路，而是一条看不见、摸不着的信息高速公路。在这条公路上，跑的不是汽车，而是一个个小小的信息包——就像信封里装着信一样，这些信息包带着各种各样的内容，从一个地方跑到另一个地方。

The internet, in English called the Internet, you can imagine as a super magical highway. Not an ordinary cement road, not even a regular highway, but an information superhighway that we can't see or touch. On this highway, instead of cars, what travel are tiny little packets of information—just like letters in envelopes, these information packets carry all kinds of content from one place to another.

这条神奇的信息公路连接着全世界无数的设备。什么是设备呢？就是你家里或者身上的那些能联网的东西——手机、平板电脑、电脑、智能手表，甚至现在的冰箱、电视和手表也可能联网。它们都连上了这条信息高速公路，就好像是这条公路上的一个个小站点。

This magical information highway connects countless devices all around the world. What are devices? They're the things at your home or on your person that can connect to the internet—phones, tablets, computers, smartwatches, and even nowadays refrigerators, TVs, and watches might be connected. They all connect to this information superhighway, like little stations along this road.

当你用平板电脑给好朋友发一条消息说“明天一起踢球吧”的时候，你的消息就会被拆成很多很多小小的信息包，这些小包会沿着信息高速公路飞快地奔跑，可能经过十几个甚至几十个中转站，最后到达好朋友的手机。好朋友的手机收到这些小包后，会把它们重新拼在一起，变成完整的消息。这就是互联网神奇的工作方式！

When you use your tablet to send a message to a good friend saying "Let's play soccer tomorrow," your message gets broken into many tiny little packets. These packets race along the information superhighway at lightning speed, possibly passing through ten or even dozens of relay stations, finally arriving at your friend's phone. When the friend's phone receives these packets, it puts them back together into the complete message. That's the magical way the internet works!

什么是网站？| What is a Website?

说到网站，你一定不陌生。每天你可能都会打开一些网站——比如学校的学习平台、你喜欢看的动画片网站、或者游戏网站。网站到底是什么呢？

When we talk about websites, you must be familiar with them. Every day you probably open some websites—like your school's learning platform, cartoon websites you like to watch, or gaming websites. But what exactly is a website?

你可以把网站想象成一本书。这本书不是用纸张做的，而是用一种特殊的“网页语言”写成的。这本书有很多很多页，每一页就是一个网页。当你想要看这本书的时候，你需要用一个特殊的工具来打开它，这个工具就叫做浏览器。常见的浏览器有Chrome、Edge、Safari等等，它们就像是读书时用的放大镜，帮助我们看清书里的内容。

You can imagine a website as a book. This book isn't made of paper, but written in a special "webpage language." This book has many, many pages, and each page is a webpage. When you want to read this book, you need a special tool to open it, and that tool is called a browser. Common browsers include Chrome, Edge, Safari, and more—they're like magnifying glasses when reading, helping us see the content clearly.

每一个网站都有一个独特的地址，就像每一个家庭都有自己的门牌号一样。比如你想去学校的网站，可能需要输入类似 www.school.edu.cn 这样的地址。你在浏览器里输入这个地址，按下回车键，浏览器就会沿着信息高速公路找到这本书，然后把内容展示给你看。是不是很神奇？

Every website has a unique address, just like every home has its own house number. For example, if you want to visit your school's website, you might need to enter an address like www.school.edu.cn. When you type this address into your browser and press Enter, the browser travels along the information superhighway to find this book, then displays the content for you to see. Isn't that magical?

网站的类型多种多样。有的是新闻网站，让我们了解世界上发生的事情；有的是学习网站，帮助我们学习新知识；有的是游戏网站，让我们娱乐放松；还有的是购物网站，让我们可以购买喜欢的东西。想象一下，互联网就像一座超级大的城市，里面有无数的建筑，每个建筑就是一个网站。而你，就是这座城市里的小小探险家！

There are many types of websites. Some are news websites that let us learn about what's happening in the world; some are learning websites that help us acquire new knowledge; some are gaming websites for entertainment; and others are shopping websites where we can buy things we like. Imagine the internet as a humongous city, with countless buildings, and each building is a website. And you? You're a little explorer in this city!

什么是服务器？| What is a Server?

好，现在我们知道了网站就像一本书。但是这本书存放在哪里呢？总得有一个地方来放这些书吧？答案就是服务器。

Okay, now we know that websites are like books. But where are these books stored? There must be somewhere to keep these books, right? The answer is servers.

服务器，英文叫 Server。你可以把它想象成一个超级大的图书馆。这个图书馆不是存放纸质书的，而是存放网站这本书的。真正的服务器是一台特殊的计算机，它被设计成可以长时间运行，几乎从不休息，而且可以同时为很多人服务。

A server, in English called Server, you can imagine as a super huge library. This library doesn't store physical books, but rather stores these website books. Real servers are special computers, designed to run for long periods almost without resting, and they can serve many people at the same time.

你可能会想，这个超级图书馆建在哪里呢？其实，它们分布在世界各地。有些在很高很高的山里，那里气候凉爽，适合服务器“降温”；有些在很深的地底下，那里安全稳定，不怕地震和洪水；还有些在漂浮的大船上……你没听错，真的是在大船上！这些大船停在海边，服务器就在船里，通过海底的电缆和全世界连接。

You might wonder, where is this super library built? Actually, they're distributed all around the world. Some are in very high mountains, where the cool climate helps servers "cool down"; some are deep underground, safe and stable,不怕 earthquakes and floods; and some are on floating ships... You heard that right, really on ships! These big ships dock by the sea, with servers inside, connected to the whole world through undersea cables.

世界上有很多很多这样的“超级图书馆”。当你想访问一个网站时，你的信息请求就会沿着互联网飞到最近的图书馆，找到那本书，然后这本书的内容会沿着互联网飞回你的设备，展示给你看。整个过程可能只需要零点几秒，快得惊人！

There are many such "super libraries" around the world. When you want to visit a website, your information request flies along the internet to the nearest library, finds that book, and then the book's content flies back