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 forthe 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.

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1.单项选择题Your company has multiple DNS servers in the main office.  You plan to install DNS on a member server in a branch office.You need to ensure that the DNS server in the branch office is able to query any DNS server in the main office， and you need to limit the number of DNS records that are transferred to the DNS server in the branch office. What should you do？ （）

A.Configure a secondary zone on the DNS server in the branch office.
B.Configure a stub zone on the DNS server in the branch office.
C.Configure a stub zone on the DNS server in the main office.
D.Configure a primary zone on the DNS server in the branch office.

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2.单项选择题Your company has an Active Directory forest that has five domains. All DNS servers are domain controllers.You need to ensure that users from all domains are able to access a Web server named App1 by browsing to http：//App1. What should you do？（）

A.Configure and enable DFS Replication on the App1 Web server.
B.Create a host （AAAA） record for the App1 Web server in the DNS zone for the forest root domain.
C.Create a zone named GlobalNames on a DNS server. Replicate the GlobalNames zone to all domain controllers in the forest. Create a host （A） record for the App1 Web server in the zone.
D.Create a zone named LegacyWINS on a DNS server. Replicate the LegacyWINS zone to all domain controllers in the forest. Create a host （A） record for the App1 Web server in the zone.

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3.单项选择题Your partner company has a single domain named partner.com. The partner.com DNS zone is Active Directory-integrated. The IP addresses of the DNS servers in the partner domain will change. You need to ensure name resolution for users in contoso.com to resources in partner.com. What should you do？（）

A.Create a stub zone for partner.com on each DNS server in contoso.com.
B.Configure the Zone Replication Scope for partner.com to replicate to all DNS servers in the forest.
C.Configure an application directory partition in the contoso.com forest. Enlist all DNS servers in the contoso.com forest in the partition.
D.Configure an application directory partition in the partner forest. Enlist all DNS servers in the partner forest in the partition.

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4.单项选择题Your company has a server named Server1 that runs a Server Core installation of Windows Server 2008， and the DNS Server server role. Server1 has one network interface named Local Area Connection. The static IP address of the network interface is configured as 10.0.0.1. You need to create a DNS zone named local.contoso.com on Server1.  Which command should you use？（）

A.ipconfig /registerdns：local.contoso.com
B.dnscmd Server1 /ZoneAdd local.contoso.com /DSPrimary
C.dnscmd Server1 /ZoneAdd local.contoso.com /Primary /file local.contoso.com.dns
D.netsh interface ip v4 set dnsserver name= local.contoso.com static 10.0.0.1 primary

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5.单项选择题Your company has two servers that run Windows Server 2008 named Server2 and Server3. Both servers have the DNS Server server role installed. Server3 is configured to forward all DNS requests to Server2.  You update a DNS record on Server2. You need to ensure that Server3 is able to immediately resolve the updated DNS record. What should you do？（）

A.Run the dnscmd . /clearcache command on Server3.
B.Run the ipconfig /flushdns command on Server3.
C.Decrease the Time-to-Live （TTL） on the Start of Authority （SOA） record of na.contoso.com to 15 minutes.
D.Increase the Retry Interval value on the Start of Authority （SOA） record of na.contoso.com to 15 minutes.

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6.多项选择题Your company has a single Active Directory forest that has six domains. All DNS servers in the forest run Windows Server 2008.You need to ensure that all public DNS queries are channeled through a single-caching-only DNS server. Which two actions should you perform？ （Each correct answer presents part of the solution.（）

A.Disable the root hints.
B.Enable BIND secondaries.
C.Configure a forwarder to the caching DNS server.
D.Configure a GlobalNames host （A）record for the hostname of the caching DNS server.

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7.单项选择题Your network consists of a single Active Directory domain. The domain contains a server named Server1 that runs Windows Server 2008.All client computers run Windows Vista. All computers are members of the Active Directory domain. You assign the Secure Server （Require Security） IPsec policy to Server1 by using a Group Policy object（GPO）. Users report that they fail to connect to Server1.You need to ensure that users can connect to Server1. All connections to Server1 must be encrypted. What should you do？ （）

A.Restart the IPsec Policy Agent service on Server1.
B.Assign the Client （Respond Only） IPsec policy to Server1.
C.Assign the Server （Request Security） IPsec policy to Server1.
D.Assign the Client （Respond Only） IPsec policy to all client computers.

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8.单项选择题Your company has computers in multiple locations that use IPv4 and IPv6. Each location is protected by a firewall that performs symmetric NAT. You need to allow peer-to-peer communication between all locations. What should you do？ （）

A. Configure dynamic NAT on the firewall.
B. Configure the firewall to allow the use of Teredo.
C. Configure a link local IPv6 address for the internal interface of the firewall.
D. Configure a global IPv6 address for the external interface of the firewall.

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9.多项选择题Your network uses IPv4.You install a server that runs Windows Server 2008 at a branch office.The server is configured with two network interfaces. You need to configure routing on the server at the branch office.Which two actions should you perform？ （Each correct answer presents part of the solution.（）

A.Install the Routing and Remote Access Services role service.
B.Run the netsh ras ip set access ALL command.
C.Run the netsh interface ipv4 enable command.
D.Enable the IPv4 Router Routing and Remote Access option.

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10.单项选择题You have a DHCP server that runs Windows Server 2008. You restore the DHCP database by using a recent backup. You need to prevent DHCP clients from receiving IP addresses that are currently in use on the network. What should you do？（）

A.Add the DHCP server option 15.
B.Add the DHCP server option 44.
C.Set the Conflict Detection value to 0.
D.Set the Conflict Detection value to 2.

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