Network security risks and how to prevent courseware. ppt

Hidden dangers of network security and how to prevent various hidden dangers of netizens Part 1 Avoid visiting malicious websites What is a malicious website? Malicious websites refer to websites that use IE vulnerabilities to embed malicious code and tamper with or destroy users' machines without their knowledge. A website that pops up a plug-in or prompts the user whether to set it as the home page is not defined as a malicious website because it requires the user to choose to confirm. Websites containing illegal and unhealthy content are not defined as malicious websites if they have not tampered with or destroyed users' machines. The first part avoids visiting malicious websites How can we avoid visiting malicious websites? Get into the good habit of surfing the Internet, install a firewall and filter with your own black and white list of IE. ? Install security tools, such as Kaka's internet security assistant, and start the blocking function of bad websites. ? Update the virus database version and system patch of anti-virus software in time. The first part is how to avoid visiting malicious websites and how to restore the system after visiting malicious urls. Remove malicious and rogue software? Fix IE? Kaka Internet Assistant 6.0 Download and Installation Guide Part II Application Security of Instant Messaging Software has many advantages, such as real-time, low cost, high efficiency, etc. It is one of the favorite ways of working communication for enterprises. However, with the geometric growth of instant messaging users such as QQ, old viruses and new viruses have gone into the sea one after another, and the group refers to IM software. The second part is the security of instant messaging software. What is an instant messaging virus? Instant messaging virus mainly refers to worms and other viruses, which automatically send malicious messages or their own files to users' contacts through instant messaging software to achieve the purpose of spreading. The second part is the spread mode of instant messaging software security virus:? Automatically send malicious short messages, usually containing one or more web addresses, pointing to malicious web pages. Once users who receive short messages click to open malicious web pages, they will automatically download and run virus programs from malicious web sites. ? Using the file transfer function of instant messaging software to send yourself directly is also a popular main mode at present. Part II When the security virus of instant messaging software spreads, friends receive the following information: Part II How to avoid being infected with instant messaging virus in the security of instant messaging software? When chatting online, it is best to turn on anti-virus software for real-time monitoring; ? Don't open web pages and attachments recommended by strangers at will, even if they are sent by friends.