Network and Information Security

The network architecture has gradually flattened as the IT system evolved over the years. The early three-tier architecture (Core-Distribution-Access) has been gradually converted into two-tier (Spine-Leaf), and many new applications have been created, such as Server virtualization, storage virtualization, and network virtualization, and the emergence of Hyper Converge Infrastructure (HCI) is the culmination of these applications.

As more and more countries in the world are attacked by Internet hackers, most of the hackers use Distributed Denial of Service (DDoS), which causes the line width for the external services are full, affecting the system's inability to operate and providing services. This is also the fastest growing form of "Ransomware" in the world since 2015.