What network does THETA use?

Could you please elaborate on the network utilized by THETA? I'm quite curious about the technological infrastructure that supports this cryptocurrency. Could you provide some insights into its architecture, perhaps highlighting any unique features or advantages it might have compared to other blockchain networks? Additionally, I'm interested in knowing if there are any plans for future upgrades or enhancements to the network that might further enhance its functionality or scalability. Thank you for your assistance in answering my question.