What network is Zilliqa on?

Could you please elaborate on the network Zilliqa operates on? As a professional practitioner in the field of cryptocurrency and finance, I'm curious to know if it's a public blockchain, a private blockchain, or perhaps a consortium blockchain. Additionally, I'm interested in understanding the key features and advantages of this network that Zilliqa has chosen to build on. Does it offer high scalability, security, and decentralization? Any insights you can provide would be greatly appreciated.