“On the wire, each label is stored with its length in front, 3 api 11 thenodebook 3 com 0, and the final 0 marks the end of the name, where the last dot would go.”

Am I the only one that doesn’t think of this as ‘api.thenodebook.com.’? What does the LLM mean by the zero after .com marking where the last dot would go?