4. Conclusion

There are many weaknesses that can be exploited by an ill-intentioned person wishing to gain unauthorized access to private information, or to prevent a computer network, whether wired or wireless, from functioning properly. What's more, all the possibilities for doing harm that have been outlined have never been based on the principle of network equipment intrusion, which is the ultimate means for a hacker to make the network do what he or she wants, but solely on the weaknesses of the TCP/IP protocol and the network services ensuring its correct operation. Finally, we haven't shown how some of these techniques used together complement each other to considerably increase their damaging power. As can be seen, the most recent worms, which in a single infection prevent the antivirus from updating itself by pointing all the machine names of antivirus vendors to 127.0.0.1 (localhost ), install...