IP security: The main attack means are passive network eavesdropping, active IP spoofing (message forgery and tampering) and routing attack (man-in-the-middle attack);

2.DNS security: This should be familiar to everyone. Modify the mapping table of DNS to mislead users' access traffic;

3.DoS attack: Denial of service attacks launched by a single attack source mainly occupy network resources and force the target to collapse. Now, DDoS, a distributed denial of service attack initiated by multiple attack sources, is more popular.

Computer foundation, computer composition principle, computer network? It's three books about computer basics, which are highly recommended to you. After reading it, you can have a preliminary understanding of computer things.

1. What can I do before surfing the Internet to ensure the safety of surfing the Internet?

First, you need to install a personal firewall. With the privacy control function, you can choose which information needs to be kept secret without accidentally sending it to unsafe websites. In this way, you can also prevent the website server from tracking your email address and other personal information without your knowledge. Secondly, please install patches and updates of system and other software in time. Basically, the earlier the update, the smaller the risk. Remember to update the firewall data in time.

2. How to prevent hacker attacks?

First of all, use a personal firewall antivirus program to prevent hacker attacks and check hacker programs (software that connects to external servers and sends your information out). Personal firewall can protect your computer and personal data from hackers and prevent applications from automatically connecting to websites and sending information to them.

Secondly, turn off these functions when you don't need to enjoy files and printing. File and print are very useful functions, but this function will also expose your computer to hackers looking for security holes. Once inside your computer, hackers can steal your personal information.

3. How to prevent computer poisoning?

First of all, don't open email attachments sent by strangers, and don't open files of instant messaging software. These files may contain Trojan horses, which enable hackers to access your documents and even control your peripheral devices. You should also install an antivirus program to protect you from viruses, Trojans and worms.

4. How to ensure information security when browsing the web?

When browsing anonymously, an information store named cookie (that is, temporary file, which can save the traces of your browsing) will be generated when logging in to the website. Many websites use cookies to track your activities on the Internet.

When using the browser, you can choose the option of turning off the computer to receive cookie in the parameter options. (Open IE browser, click Tools-Internet Options, select Privacy in the opened options, uncheck the Cookies check box, and click OK).

5. How to ensure your information security when shopping online?

When shopping online, make sure to use a secure connection. You can determine whether the connection is secure by checking whether the lock icon in the corner of the browser window is closed. Please read the privacy policy of this website before making any transaction or sending information. Because some websites will sell your personal information to third parties. Don't disclose your personal information and password to anyone when surfing the Internet.