What network does 1inch use?

Could you elaborate on the network infrastructure that 1inch leverages for its operations? Given the importance of network scalability, security, and interoperability in the cryptocurrency space, I'm particularly interested in understanding the choice behind 1inch's network selection. Is it a public blockchain like Ethereum or perhaps a more specialized solution tailored to decentralized finance? Furthermore, how does this network choice contribute to 1inch's ability to provide competitive services and features within the DeFi ecosystem?