Does Kaspa have a separate node for the TN-11 testnet?

Yes — as of December 2024, there is a dedicated version of the Rust Kaspa node that is required to participate in the TN-11 testnet. A testnet is a separate, experimental network where changes can be tried out without affecting real KAS. TN-11 runs a hard-forked build of the Rust node, meaning its consensus rules diverged from the mainnet node in a way that is not backward-compatible. Because of that divergence, the ordinary mainnet node cannot connect to TN-11 at all — you must use the TN-11-specific build. This matters for anyone who wants to run a Kaspa node on TN-11: grabbing the wrong software means you simply will not join the testnet, so checking which version you need is the first step.