Ethereum Name Service (ENS) is heavily researching ways to build its protocol on Ethereum layer-2 networks, with the possibility of launching its own in-house layer 2, according to ENS executive director Khori Whittaker. In an interview with Cointelegraph, Whittaker said the ENS team is debating whether to build its integration on a pre-existing Ethereum layer-2 network or release an in-house L2 called "the identity layer." He revealed that most conversations between ENS developers are focused on pursuing development on Optimism and that future L2 development may also involve the use of zero-knowledge proofs.