Network Security Threats Network security threats can be classified into four broad terms: Threats These initiate mostly from non familiar users by using easy existing hacking applications from the Internet. Some of the users in this class are inspired by malicious target but most are encouraged by the academic challenges are known as script kiddies. They are not the most experienced users, or programmers but they have the time and courage. Trojan horse can be explained as software that executes a game on the user’s system. While the user is playing the game, it mails a copy of itself to every client in the user’s contact book. Then other clients get the game and play it, in this case, the Trojan horse spreads.[5] 1.1.1.2 Structured Threats These initiate from users that are motivated and technically competent than script kiddies. They capable of understanding network systems design and the threat of those systems. They have the ability to create hacking scripts that can penetrate ...