how might a security professional help prevent successful attacks on a network?

Brief Explanations:

Security professionals can implement firewalls to block unauthorized access, conduct regular vulnerability assessments to identify weak - points, and provide security awareness training to users to prevent social - engineering attacks. They can also set up intrusion detection and prevention systems to monitor and stop malicious activities in real - time.

Answer:

They can implement firewalls, conduct vulnerability assessments, provide user training, and set up intrusion detection and prevention systems.