Domain Name System (DNS) and Dynamic DNS (DDNS)

This section covers hierarchical naming, domain resolution, resource records, and the role of dynamic updates in maintaining accurate name-to-address mappings.

Learning Goals

Explain the structure of the domain name space and the hierarchical organization of DNS.
Describe how DNS resolution works, including recursive and iterative query processes.
Identify common DNS resource records and state their functions in name resolution and service discovery.
Analyze the purpose of DDNS and explain how dynamic updates support hosts with changing IP addresses.
Trace a hostname resolution process from client request to authoritative answer and interpret the results.

Introduction to Application Layer Services and Protocols

TELNET and Remote Access Services