the purpose of DNS

Systems Architecture
7th Edition
ISBN:9781305080195
Author:Stephen D. Burd
Publisher:Stephen D. Burd
Chapter13: Internet And Distributed Application Services
Section: Chapter Questions
Problem 3RQ
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The Domain Name System is a name service design whose main naming database is used across the Internet.
i. What is the purpose of DNS?
ii. Describe, by means of a diagram, how a new client request to a server
www.example.co.uk will take place through the local, root and authoritative servers?

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