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A DNS zone is a is a collection of DNS resource records (like itflee.com and its associated IP address). There are two main types of DNS zones; forward and reverse lookup zones. Forward lookup zones are the most common, and translates host names to IP addresses. A reverse lookup zone does the exact opposite in that it translates an IP address to a host name.

A primary zone is a DNS zone that this DNS server is the primary source of information. By default, the data for this zone is stored in a local file named zone_name.dns and is located in the %windir%\System32\Dns directory. The file may also be stored in Active Directory if this DNS server is also a write-able Domain Controller.
There are several benefits and reasons why you would want to store a primary zone in Active Directory. Since the zone is stored in AD, the zone can be replicated using AD replication process and AD’s security features.It is also worth mentioning that a primary zone is the only zone type that can be directly edited or updated.
Secondary Zones
A secondary zone is a read-only replica of a primary DNS zone that is hosted on another remote DNS server. This obviously means that your DNS server must have network access to the remote DNS server in order to gather the information. This DNS zone is not stored in AD DS because it is a mere read-only copy of the DNS zone.
If you try to make a change in a secondary DNS zone, the change request will be passed on to the server which holds the primary zone. If the server is available, the change will be made.
The purpose of a secondary DNS zone comes down to redundancy. If the server hosting the primary copy is unavailable, this server will be available for use by clients in its place. One of the issues with a secondary DNS zone is that each record held within this zone must be replicated from another server. On large networks that have frequent DNS server changes this can be somewhat resource intensive.
Stub Zones
A stub zone is similar to a secondary zone in that it is a read-only zone that obtains its information from other DNS servers. The main difference between a stub zone and a secondary zone, is that while a secondary zone contains an exact replica (including all resource records) of a primary zone, a stub zone only contains information about authoritative name servers.
So inside a stub zone you will not find records for computer host names, but instead records for other DNS servers. The purpose of this zone is to allow hosts on one network to obtain information from a DNS server on another network, without this DNS server needing to replicate all of the data inside of the other DNS server.You can think of stub zones as being a less resource intensive version of a secondary zone.
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CURRICULUM
Course Introduction • 10min
0 / 2 lessons complete
Instructor and Course Introduction
Video | 7 min
What's New in Windows Server 2016 DNS
Free lesson
Video | 3 min
DNS Basics • 56min
0 / 8 lessons complete
What is DNS
Video | 3 min
Installing the DNS Windows Server Role
Video | 6 min
Building DNS Server Quiz
Quiz | 10 Questions
The Hosts File
Video | 4 min
DNS Console Overview
Video | 7 min
Recursive and Iterative Queries
Video | 8 min
DNS Basics LAB
Video | 10 min
DNS Basics Quiz
Quiz | 8 Questions
DNS Resource Records • 45min
0 / 5 lessons complete
DNS Resource Record Types
Video | 3 min
Creating the mytestzone Forward Lookup Zone
Text | 2 min
Creating DNS Resource Records
Video | 4 min
Creating DNS Resource Records Lab
Lab | 30 min
DNS Resource Records Quiz
Quiz | 7 Questions
DNS Zones • 4hr 11min
0 / 12 lessons complete
DNS Zones
Video | 4 min
Creating a Forward and Reverse Lookup Zone
Video | 5 min
Creating a Secondary Zones
Video | 9 min
Stub Zone Creation
Video | 11 min
Active Directory Zone Replication
Video | 12 min
Implementing DNS Forwarding
Video | 8 min
Implementing Conditional DNS Forwarding
Video | 7 min
Forward and Reverse Zone Creation Lab
Lab | 60 min
Creating a Secondary Zone Lab
Lab | 30 min
Conditional Forwarding Lab
Lab | 60 min
Creating a Stub Zone Lab
Lab | 30 min
DNS Zones Quiz
Quiz | 15 Questions
DNS Delegation • 50min
0 / 4 lessons complete
Domain Name System and DNS Delegation
Video | 7 min
Windows 2016 Server and DNS Zone Delegation
Video | 8 min
DNS Delegation Lab
Lab | 30 min
QUIZ - Domain Name System and DNS Delegation
Quiz | 5 Questions
DNS Security Techniques • 36min
0 / 5 lessons complete
DNS Security Techniques Overview
Video | 9 min
Configuring DNS Cache Locking
Video | 5 min
Configuring DNS Socket Pools
Video | 6 min
Configuring Response Rate Limiting
Video | 8 min
DNS Security Techniques Quiz
Quiz | 8 Questions
Advanced DNS Topics • 22min
0 / 5 lessons complete
Overview of Advanced Topics
Video | 1 min
Enabling Round Robin and Netmask Ordering
Video | 5 min
Configuring Recursion
Video | 4 min
IPV4 and IPV6 Root HInts
Video | 6 min
Advanced DNS Topics Quiz
Quiz | 6 Questions
DNS Security (DNSSEC) • 1hr 16min
0 / 6 lessons complete
Windows DNS Security Overview
Video | 7 min
Symmetric vs Asymmetric Encryption
Video | 5 min
Installing DNSSEC on Windows 2016 Server
Video | 12 min
DNSSEC Client Install
Video | 7 min
DNSSEC (DNS Security Lab)
Lab | 30 min
DNSSEC Quiz
Quiz | 15 Questions
DNS Policies • 55min
0 / 6 lessons complete
DNS Policies Background Information
Video | 8 min
Configuring DNS Filtering
Video | 7 min
Configuring Split Brain DNS in an Active Directory Environment
Video | 12 min
Configuring DNS Selective Recursion Policy
Video | 7 min
Configuring a Traffic Management Policy
Video | 11 min
DNS Policies Quiz
Quiz | 10 Questions
PowerShell for DNS • 1hr 27min
0 / 6 lessons complete
PowerShell for DNS Part 1
Video | 2 min
PowerShell for DNS Part 2
Video | 5 min
PowerShell for DNS Part 3
Video | 10 min
PowerShell for DNS Part 4
Video | 5 min
PowerShell for DNS LAB
Lab | 60 min
Powershell for DNS Quiz
Quiz | 5 Questions
Troubleshooting DNS Issues - Troubleshooting Tools • 1hr 39min
0 / 8 lessons complete
Troubleshooting Tools Every IT Pro Must Know
Video | 9 min
The Events Viewer Overview
Video | 6 min
Subscriptions
Video | 9 min
Monitoring and Debug Logging
Video | 9 min
Trouble-Shooting DNS Client Issues
Video | 4 min
Troubleshooting Subscriptions Lab
Lab | 30 min
DNS Troubleshooting Lab
Lab | 30 min
DNS Troubleshooting Quiz
Quiz | 2 Questions