Why do domain names sometimes end with a dot?

The article by Julia Evans delves into a fascinating topic concerning domain names and their structure. It begins by clarifying that every URL ends with a dot, which is a crucial aspect in the DNS protocol. Understanding the trailing dot as an integral part of the address is key to comprehending how the internet operates. Evans differentiates between domain names with the dot and those without, explaining how this can affect the functionality of websites. She also discusses the hierarchical structure that DNS assumes, where the dot separates various levels in this hierarchy. Ultimately, the article not only informs us why the dot is vital in domain names but also emphasizes how understanding this can lead to a better grasp of the entire internet's functioning. In conclusion, the dot at the end of the address is not just a formality but a significant component of network functioning that every internet user should comprehend.