Lecture TCP-IP protocol suite - Chapter 18: Domain Name System (DNS)

After studying this chapter you will be able to: Understand how the DNS is organized, know the domains in the DNS, know how a name or address is resolved, be familiar with the query and response formats, understand the need for DDNS.
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Lecture TCP-IP protocol suite - Chapter 18: Domain Name System (DNS) Chapter18 DomainName System (DNS)McGrawHill ©TheMcGrawHillCompanies,Inc.,2000 CONTENTS •NAMESPACE •DOMAINNAMESPACE •DISTRIBUTIONOFNAME SPACE •DNSINTHEINTERNET •RESOLUTION •DNSMESSAGES •TYPESOFRECORDS •COMPRESSION •EXAMPLES •DDNS •ENCAPSULATIONMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 18.1 NAME SPACEMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 18.2 DOMAIN NAME SPACEMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure181 Domain name spaceMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure182 Domain names and labelsMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure183 FQDN and PQDNMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure184 DomainsMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 18.3 DISTRIBUTION OF NAME SPACEMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure185 Hierarchy of name serversMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure186 Zones and domainsMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 A primary server loads all information from the disk file; the secondary server loads all information from the the primary server. When the primary downloads information from the secondary, it is called zone transfer.McGrawHill ©TheMcGrawHillCompanies,Inc.,2000 18.4 DNS IN THE INTERNETMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure187 DNS in the InternetMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure188 Generic domainsMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure189 Country domainsMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure1810 Inverse domainMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000 18.5 RESOLUTIONMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure1811 Recursive resolutionMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000Figure1812 Iterative resolutionMcGrawHill ©TheMcGrawHillCompanies,Inc.,2000