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About this document
- Pages
- 49 pages
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- $45 one-time, yours to keep
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- Format
- Subject
- Computer Science, Information Technology
- Module
- Chapter 17
This document explains how the Domain Name System (DNS) is organized and how it works. It covers the structure of DNS, name resolution, and DNS messages. It is useful for understanding the basics of DNS and its role in the TCP/IP protocol suite.
What's inside
- DNS objectives
- Name space organization
- Domain name space structure
- Distribution of name space
- DNS in the Internet
- Name resolution processes
Who it is for: Students studying the Domain Name System (DNS) in a Computer Science or Information Technology course. (Undergraduate)
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Summary
The Domain Name System (DNS) is a key part of the internet. Students learn how DNS works and how it helps users find websites and other internet resources.
Name Space
Names assigned to machines must be unique. Name spaces can be organised in two ways. Flat name spaces and hierarchical name spaces are explained.
Domain Name Space
The domain name space is hierarchical. It is designed as an inverted-tree structure. Labels, domain names and domains are discussed.
Distribution of Name Space
The domain name space is distributed among many computers. These are called DNS servers. The hierarchy of name servers, zones, root servers and primary and secondary servers are covered.
DNS in the Internet
The domain name space is divided into three sections. These are generic domains, country domains and the inverse domain. Registrars are also mentioned.
Key terms
- DNS
- The Domain Name System is a key part of the internet.
- Name space
- A name space maps each address to a unique name.
- DNS servers
- DNS servers hold the information contained in the domain name space.
- Domain name space
- The domain name space is hierarchical and is designed as an inverted-tree structure.
- Registrar
- A registrar is involved in the domain name space in the internet.
- Name-address resolution
- Name-address resolution is mapping a name to an address or an address to a name.
Questions this document helps with
- What is the Domain Name System?
- How is the domain name space organised?
- What are the three sections of the domain name space in the internet?
Summary written with AI from the document's text.
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