DNS Design Goals, Objectives, and Assumptions

As we just saw, the elapsed time from the first RFC discussing TCP/IP domain names to the publishing of the official standards describing the operation of DNS was more than six years. This is a very long time for the development of a system, but it isn't surprising. A lot of thought had to go into the creation of DNS, to be certain that it would meet all of the many demands that would be placed on it.

The first problem was that the creators of DNS needed to worry about both how to define the new system and how to migrate from the old one. Considerable time was spent figuring out how all the existing hosts would be moved over to the new DNS name space and how the new protocols for exchanging DNS information ...

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