DNS Flashcards
What four events trigger a zone transfer?
- The initial transfer occurs when a secondary zone is created.
- The zone refresh interval expires.
- The DNS Server service is started at the secondary server.
- The master server notifies the secondary server that changes have been made to a zone.
What are the three types of zone transfers?
- Full transfer (AXFR)
- Incremental transfer (IXFR)
- DNS Notify
What are the 3 zone transfer settings?
- To any server: Allows a data transfer to any server that asks for a zone transfer (least secure).
- Only to servers listed on the Name Servers tab: Restricts zone transfers to secondary DNS servers as defined with NS resource records.
- Only to the following servers: Restricts zone transfers to those servers specified in the accompanied list.
What does a transfer from master mean for a secondary zone?
• Transfer from Master: Determines whether the local secondary zone serial number has expired and then pulls a zone transfer from the master server.
What does reload from master mean in a secondary zone?
• Reload from Master: Performs a zone transfer regardless of the serial number in the secondary zone’s SOA resource records.
What 6 tasks can dnscmd allow you to do?
- Create, delete, and view zones and records
- Reset server and zone properties
- Perform zone maintenance operations, such as updating the zone, reloading the zone, refreshing the zone, writing the zone back to a file or to Active Directory, and pausing or resuming the zone
- Clear the cache
- Stop and start the DNS service
- View statistics
What command is used to view zones on a dns server?
dnscmd server1.contoso.com /enumzones
What is a Zone delegation?
A DNS child zone hosted on another server for performance
What is a stub zone?
Hosts name server, resource and A records for the authoritative name servers without going to the root domain servers
