What are the standard preventive security measures against a cyber attack?

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What are the standard preventive security measures against a cyber attack?

Since the internet boom security is a growing concern. Software developers got more an d more aware of the security threats posed upon their software systems. They began to implement development and testing practices to make their code more and more secure. Unfortunately there is no such thing as 100% secure. Hackers keep finding new ways to exploit a system but because of the better quality of code the bar has been raised.

On a system and network level various appliances and software has been developed to prevent intrusion and attacks. Firewalls form the front line of defense against unwanted connections; other systems like Intrusion Detection Systems examine web traffic on a deeper level. Virus scanners and malware removers scan computers for malicious software and remove them. Most critical systems are not connected to the internet to prevent attacks from the outside.

Authentication methods are developed to identify the person accessing a system. These have evolved over the years and are becoming stronger. The human element can be a weakness here.