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.
相关考题
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多项选择题
YourcompanyhasasingleActiveDirectoryforestthathassixdomains.AllDNSserversintheforestrunWindowsServer2008.YouneedtoensurethatallpublicDNSqueriesarechanneledthroughasingle-caching-onlyDNSserver.Whichtwoactionsshouldyouperform？（Eachcorrectanswerpresentspartofthesolution.（）
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. -
单项选择题
YournetworkconsistsofasingleActiveDirectorydomain.ThedomaincontainsaservernamedServer1thatrunsWindowsServer2008.AllclientcomputersrunWindowsVista.AllcomputersaremembersoftheActiveDirectorydomain.YouassigntheSecureServer（RequireSecurity）IPsecpolicytoServer1byusingaGroupPolicyobject（GPO）.UsersreportthattheyfailtoconnecttoServer1.YouneedtoensurethatuserscanconnecttoServer1.AllconnectionstoServer1mustbeencrypted.Whatshouldyoudo？（）
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. -
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.
