What is the fine-grained topic of the following text: To be ready for networking internally and with other Evonik sites, the Mobile plant had to get the architecture right, Sowell " said We are remotely accessing information from the process data network (PDN) through our demilitarized zone to Emerson’s AMS ARES Asset Source Interface and then to the office network, Sowell" explained. Only return the topic.
Setting up network architecture for remote access at Evonik's Mobile plant