DRAG DROP
Your network contains an Active Directory domain named contoso.com. The domain contains a domain
controller named DC1 that has the DNS Server serverrole installed. DC1 hosts an Active Directory-integrated
zone for the domain. The domain contains a member server named Server1.
You install the DNS Server server role on Server1.
You need to ensure that Server1 can respond authoritatively to queries for the existing contoso.com
namespace.
Which cmdlets should you run on each server? (To answer, drag the appropriate cmdlets to the correct
servers. Each cmdlet may be used once, more than once, or not at all. You
may need to drag the split bar between panes or scroll to view content.)
Answer: 
Explanation:
Can anyone help me understand the answer? Thanks 😀
dc1 must be the first dns server, so primary zone
An authoritative name server is a name server that gives answers that have been configured by an original source, so the original source is DC1
The Set-DnsServerPrimaryZonecmdlet changes settings for an existing Domain Name System
(DNS) primary zone. You can change values that are relevant for either Active Directoryintegrated
zones or file-backed zones. This cmdlet should be run on Server1 to make it
authoritative. The Add-DnsServerSecondaryZonecmdlet adds a specified secondary zone on a
Domain Name System (DNS) server. You can create either a forward lookup zone or a reverse
lookup zone. This cmdlet should be run on DC1.
DC1 will be configured to allow zone transfers to enable secondary zone, we configure the zone transfer using the command: Set-DNSServerPrimaryZone
Server 1 will be configured as secondary zone to receive and manage the DNS requests.
I agree with mhmdshawqi
You must allow the zone transfers from DC1 to the secondary zone on Server1 before Server1 will be able to respond for that secondary zone which is essentially a copy of the Primary Integrated Zone that is on DC1.
Agree with the answer and Mr Ballsacks!