Your company has a single Active Directory domain. The ……

单项选择题Your company has a main office and a branch office. The main office has a domain controller named DC1 that hosts a DNS primary zone. The branch office has a DNS server named SRV1 that hosts a DNS secondary zone. All client computers are configured to use their local server for DNS resolution. You change the IP address of an existing server named SRV2 in the main office.You need to ensure that SRV1 reflects the change immediately. What should you do？（）

A. Restart the DNS Server service on DC1.
B. Run the dnscmd command by using the /zonerefresh option on DC1.
C. Run the dnscmd command by using the /zonerefresh option on SRV1.
D. Set the refresh interval to 10 minutes on the Start of Authority (SOA) record.

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 their DNS Master servers for the zone.The company adds a new branch office. You add a member server named Branch3 and install the DNS Server server role on the server. You configure a secondary zone for the domain. The zone transfer fails.You need to configure DNS to provide zone data to the DNS server in the new branch office. What should you do？（）

A. Run dnscmd by using the ZoneResetMasters option.
B. Run dnscmd by using the ZoneResetSecondaries option.
C. Add the new DNS server to the Zone Transfers tab on one of the DNS servers in the main office. 
D. Add the new DNS server to the DNSUpdateProxy Global security group in Active Directory Users and Computers.

单项选择题Your company has a domain controller named Server1 that runs Windows Server 2008 R2. Server1 has the DNS Server server role installed.You need to configure the DNS server to resolve IP addresses to host names. Which record should you create？（）

A. Pointer (PTR)
B. Host Info (HINFO)
C. Service Location (SRV)
D. Canonical Name (CNAME)

单项选择题Your company has a domain controller named Server1 that runs Windows Server 2008 R2 and the DNS Server server role. A server named Server2 runs a custom application. You need to configure DNS to include the following parameters for the custom application: ¡¤Servic ¡¤Priorit ¡¤Weigh ¡¤Protoco ¡¤Port numbe ¡¤Host offering this servic Which record should you create？（）

A. Host Info (HINFO)
B. Service Location (SRV)
C. Canonical Name (CNAME)
D. Well-Known Service (WKS)

单项选择题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？（）

A. Set the priority value of the Server2 Mail Exchanger (MX) record to 20. Create a new Mail Exchanger (MX) record for Server3. Set the priority value to 5. 
B. Set the priority value of the Server2 Mail Exchanger (MX) record to 5. Create a new Mail Exchanger (MX) record for Server3. Set the priority value to 20.
C. Create a new Service Location (SRV) record in the domain for Server3. Set the port number value to 25. Configure the priority setting to 20.
D. Create a new Service Location (SRV) record in the domain for Server3. Set the port number value to 110. Configure the priority setting to 5.