Your company has a domain controller named Server1 that runs Windows Server 2008 R2 and the DNS server role. A server named Server2 runs Windows Server 2003 and Microsoft Exchange Server 2007. The company wants to deploy a new Exchange server named Server3 to receive all inbound e-mail traffic. You need to configure DNS to direct incoming e-mail traffic to the Exchange servers. You also need to ensure that higher priority is given to Server3. 
What should you do？（）

单项选择题Your company has a domain controller that runs Windows Server 2008 R2 and the DNS role. The DNS domain is named contoso.com. You need to ensure that inquiries about contoso.com are sent to dnsadmin@contoso.com. What should you do？（）

A. Create a Signature (SIG) record for the domain controller.
B. Modify the Name Server (NS) record for the domain controller.
C. Modify the Service Location (SRV) record for the domain controller.
D. Modify the Start of Authority (SOA) record on the domain controller.

多项选择题You are building a test environment to evaluate DNS Security Extensions (DNSSEC). You have a domain controller named Server1 that runs Windows Server 2008 R2 in your test environment. Server1 has the DNS Server server role installed. You need to configure Server1 to support the DNSSEC evaluation. Which two actions should you perform？（）

A. Create a new Quad-A (AAAA) DNS record.
B. Create a new Signature (SIG) DNS record.
C. Create a new Public key (KEY) DNS record.
D. Create a new Well-known service (WKS) DNS record.

单项选择题Your company has a server that runs Windows Server 2008 R2.You have a new application that locates remote resources by name. The new application requires IPv6.You need to ensure that the application can locate remote resources by using IPv6. What should you do？（）

A.CreateanewPointer（PTR）DNSrecord.
B.CreateanewQuad-A（AAAA）DNSrecord.
C.CreateanewSignature（SIG）DNSrecord.
D.CreateanewRouteThrough（RT）DNSrecord.

单项选择题Your company has a single Active Directory domain. All servers run Windows Server 2008 R2.You install an additional DNS server that runs Windows Server 2008 R2.You need to delete the pointer record for the IP address 10.3.2.127. What should you do？（）

A. Use DNS manager to delete the 127.in-addr.arpa zone.
B. Run the dnscmd /RecordDelete 10.3.2.127 command at the command prompt.
C. Run the dnscmd /ZoneDelete 127.in-addr.arpa command at the command prompt.
D. Run the dnscmd /RecordDelete 10.in-addr.arpa. 127.2.3 PTR command at the command prompt.

单项选择题Your company has a main office and two branch offices. Domain controllers in the main office host an Active Directory-integrated zone.The DNS servers in the branch offices host a secondary zone for the domain and use the main office DNS servers as the DNS Master servers for the zone. Each branch office has an application server. Users access the application server by using its fully qualified domain name. You need to ensure that users in the branch offices can access their local application server even if the WAN links are down for three days. What should you do？（）

A. Increase the Expires After setting to 4 days on the Start of Authority (SOA) record for the zone.
B. Increase the Refresh Interval setting to 4 days on the Start of Authority (SOA) record for the zone.
C. Configure the Zone Aging / Scavenging Properties dialog box to enable Scavenge stale resource records, and set the Refresh setting to 4 days.
D. Configure the Zone Aging / Scavenging Properties dialog box to enable Scavenge stale resource records, and set the No-refresh interval setting to 4 days.