ESSENTIAL 5 Detect Breaches Promptly As a business owner or IT manager, it is vital that you understand your IT networks and systems so that you can detect unauthorised or suspicious activities as quickly as possible. This can be done through continuous monitoring and frequent reviewing of audit trails and security logs. Audit trails show who has accessed the IT network or system and what operations he or she has performed during a given period of time. Security logs contain records of login/logout activity. This strategy helps you maintain security and recover lost transactions. It pinpoints network weaknesses and points of illegal intrusion, and also detects suspicious network activity. It also tells you whether the attacker is an employee or an outside party. With security logging, users who log into the system can be identified. This measure also indicates if such access is unauthorised or unnecessary.