With the continuous cloudification of enterprise IT architectures and widespread use of public clouds, increasingly more enterprises are starting to shift their infrastructures (such as enterprise data centers) to the cloud, abandon traditional closed IT architectures, and instead use open network architectures. To further this, enterprises’ mission-critical applications are migrated onto the cloud, such as the office, production ERP system, and sales system. Under this situation, enterprises increasingly rely on the Software as a Service (SaaS) provided by application service providers, and prefer to access key applications required for daily office work from the cloud through the Internet.
