The only way to know how well your network infrastructure will hold up under an attack from real-world cybercriminals is to test your network with security experts capable of thinking and acting just like them. White hats or ethical hackers can help you know for sure.
A network under attack is not fun. It disrupts business, creates chaos and puts all eyes on you to fix the problem. Threat actors continue to hone their tradecraft meaning that even if your network received an A+ in security yesterday, it may not tomorrow. Reacting to an event puts the threat actor in control. Proactive security—tested thoroughly—puts you back in control quickly, reducing risks and costs.