Final answer:
The recommended strategy to improve server security would be updating and patching server software regularly to fix vulnerabilities. Adding two-factor authentication, enforcing stronger passwords, and employee education can further enhance security.
Step-by-step explanation:
The most effective strategy to improve server security for a global corporation that has faced numerous cyber threats would be regularly updating and patching server software. This process is crucial as it fixes security vulnerabilities that could be exploited by hackers. Software updates often include patches for security holes that have been discovered since the last update, keeping the system more secure against potential attacks. Additionally, two-factor authentication, the use of stronger passwords, and educating employees on how to avoid scams will further reinforce server security. These measures, alongside implementing robust protections for websites, are all part of a comprehensive security strategy that can protect against the kinds of large-scale data breaches that have impacted major organizations and exposed millions to the threat of identity theft.