What are the two kinds of DLT based on access permission?

The distinction between permissioned and permissionless distributed ledger technology (DLT) revolves around access control and user participation. Permissioned DLT allows only authorized users to access the network and participate in consensus processes. This controlled approach is typically utilized in enterprise settings where privacy, compliance, and data governance are critical, enabling organizations to manage who can view and interact with the ledger.

In contrast, permissionless DLT is open to anyone who wishes to participate. This openness fosters a decentralized environment where anyone can join the network, validate transactions, and contribute to maintaining the ledger without needing permission from a central authority. Public blockchains, such as Bitcoin and Ethereum, exemplify this unrestricted access.

While other terms like "public and private" often describe similar concepts, using "permissioned and permissionless" emphasizes the control aspects inherent to different types of DLT. The focus is distinctly on the permissions granted to users, making it a more precise characterization of the access capabilities inherent to various distributed ledger frameworks.