Network Systems Security Analysis has utmost importance in today’s world. Many companies, like banks
which give priority to data management, test their own data security systems with “Penetration Tests” by time to time.
In this context, companies must also test their own network/server systems and take precautions, as the data security
Based on this idea, the study cyber-attacks are researched throughoutly and Penetration Test technics are examined. With
these information on, classification is made for the cyber-attacks and later network systems’ security is tested
systematically. After the testing period, all data is reported and filed for future reference.
Consequently, it is found out that human beings are the weakest circle of the chain and simple mistakes may
unintentionally cause huge problems. Thus, it is clear that some precautions must be taken to avoid such threats like
updating the security software.