Configure Network Services - MCSA Windows Server 2012 R2: Installation and Configuration Study Guide - page 83

PowerShell cmdlet, the server-level statistics are retrieved and shown. If an administrator
uses the Clear parameter in the PowerShell cmdlet along with the ZoneName parameter,
the statistics for the specified zone will be cleared. So, use this cmdlet carefully.
Record Weighting
Weighting DNS records will allow an administrator to place a value on DNS SRV records.
Clients will then randomly choose SRV records proportional to the weight value assigned.
Netmask Ordering
If round robin is enabled, when a client requests name resolution, the first address entered
in the database is returned to the resolver, and it is then sent to the end of the list. The next
time a client attempts to resolve the name, the DNS server returns the second name in the
database (which is now the first name) and then sends it to the end of the list, and so on.
Round robin is enabled by default.
Netmask ordering is part of the round-robin process. When an administrator configures
netmask ordering, the DNS server will detect the subnet of the querying client. The DNS
server will then return a host address available for the same subnet. Netmask ordering is
enabled through the DNS Manager console on the Advanced tab of the server Properties
dialog box.
DnsUpdateProxy Group
As mentioned previously, the DHCP server can be configured to register host (A) and
pointer (PTR) resource records dynamically on behalf of DHCP clients. Because of this, the
DNS server can end up with stale resources. To help solve this issue, an administrator can
use the built-in security group called DnsUpdateProxy .
To use the DnsUpdateProxy group, an administrator must first create a dedicated user
account and configure the DHCP servers with its credentials. This will protect against the
creation of unsecured records. Also, when you create the dedicated user account, members
of the DnsUpdateProxy group will be able to register records in zones that allow only
secured dynamic updates. Multiple DHCP servers can use the same credentials of one
dedicated user account.
Now that you have looked at some of the new features of Windows Server 2012 R2
DNS, let's take a look at some of the DNS record types.
Windows PowerShell Support
Microsoft has more than 100 PowerShell cmdlets specifically for DNS. While in Windows
PowerShell, you can list all of the DNS cmdlets that are available. To see the entire list, use
the following PowerShell command:
Get-Command -Module DnsServer cmdlet.