![]() On the top of the hierarchy are 13 root servers (of course not individual machines, but server farms instead). ![]() The database behind the service is distributed among them throughout the world, just see. The ‘com’ is the so called TLD (top-level domain) part of the name, ‘yahoo’ is the second-level domain (SLD) and ‘The names are hierarchical, and so are the DNS servers. For example, the name is related to the IP address of 46.228.47.114. DNS is more complex than the following examples show, but these should be enough to understand the basics.ĭNS is a simple directory service it provides IP addresses related to domain names and vice versa. In this article, we’ll see DNS in action and how to simulate the operation of real domain servers. ![]() Click here to download the Packet Tracer files for this lab
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