Networking and Operating Systems

Network+,  Lesson 6.5: Domain Name System  – TestOut

Exam Objectives Covered: 

  • 1.4 Explain common networking ports, protocols, services, and traffic types. 
  • 3.4 Given a scenario, implement IPv4 and IPv6 network services. 

Links:

Overview:

Each host that has an IP address assigned to it can also have a descriptive name. This makes it easier for human users to identify and access it on the network and for application services to be configured with an 
addressing scheme that allows for changes in the underlying network. Almost all networks depend on this name resolution functionality to operate smoothly and securely, so it is important to understand how it works. In this topic, you will identify methods for host name resolution for TCP/IP networks. 

Text Lessons:

  • 6.5.1 Host Names and Domain Names 
  • 6.5.2 DNS Hierarchy 
  • 6.5.3 Name Resolution Using DNS 
  • 6.5.4 Resource Record Types 
  • 6.5.5 Host Address and Canonical Name Records 
  • 6.5.6 Mail Exchange, Service, and Text Records 
  • 6.5.7 Pointer Records 
  • 6.5.9 Internal vs External DNS

Text and Video Lessons:

  • 6.5.8 DNS Server Configuration (11:37 minutes) 
  • 6.5.10 DNS Security (4:24 minutes) 
  • 6.5.16 Configuring DNS Caching on Linux Demo (4:24 minutes) 

Lab/Activity:

  • 6.5.11 Lab: Configure DNS Addresses 
  • 6.5.12 Lab: Create Standard DNS Zones 
  • 6.5.13 Lab: Create Host Records 
  • 6.5.14 Lab: Create CNAME Records 
  • 6.5.15 Lab: Troubleshoot DNS Records 

Quiz/Assessment:

  • 6.5.17 Lesson Review (15 questions) 

Topics Discussed:

  • How do Domain Name Service (DNS) queries resolve host names and domains to IP addresses? 
  • What is the role of the root servers in the DNS hierarchy? 
  • In DNS, what is the difference between a zone and a domain? 
  • What is the difference between a forward lookup zone and a reverse lookup zone? 
  • What functions do different record types have, such as A records and PTR records? 
  • What methods can be used to ensure the security of name queries? 

Assignment:

  1. Access the TestOut Courseware through the provided link.
  2. Study Lesson 6.5: Domain Name System and complete the 6.5.11 Lab: Configure DNS Addresses, 6.5.12 Lab: Create Standard DNS Zones, 6.5.13 Lab: Create Host Records, 6.5.14 Lab: Create CNAME Records, 6.5.15 Lab: Troubleshoot DNS Records, and the 15 question 6.5.17 Lesson Review Exam to complete the Section.

Assigned: May 6th, 2025
Teacher Pacing Due Date: May 8th, 2025