Your company has a main office and a branch office. The company network has two WINS servers.You have an application that requires NetBIOS name resolution.The WINS servers are configured as shown in the following table.
Location  Server name  IP address
Main office  DC1  10.1.0.23
Branch office  DC2  10.6.0.254
You discover that the WINS addresses on all client computers in both offices are configured in the following order of use:
10.1.0.23
10.6.0.254
You reconfigure the WINS addresses on all client computers in the branch office in the following order of use:
10.6.0.254
10.1.0.23
After the reconfiguration, users in the branch office are unable to connect to the servers that are located in the main office.You need to restore name resolution in the branch office.
What should you do?（）

Your company has two servers that run Windows Server 2008 R2 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？（）

Your company has a single Active Directory forest that has an Active Directory domain named na.contoso.com. A server named Server1 runs the DNS Server server role. You notice stale resource records in the na.contoso.com zone. You have enabled DNS scavenging on Server1. Three weeks later, you notice that the stale resource records remain in na.contoso.com. You need to ensure that the stale resource records are removed from na.contoso.com.
What should you do？（）

Contoso Ltd. has a single Active Directory forest that has five domains. Each domain has two DNS servers. Each DNS server hosts Active Directory-integrated zones for all five domains. All domain controllers run Windows Server 2008 R2.Contoso acquires a company named Tailspin Toys. Tailspin Toys has a single Active Directory forest that contains a single domain. You need to configure the DNS system in the Contoso forest to provide name resolution for resources in both forests.
What should you do？（）

Your company has a single Active Directory forest that has six domains. All DNS servers in the forest run Windows Server 2008 R2.You need to ensure that all public DNS queries are channeled through a single-caching-only DNS server.
Which two actions should you perform？（）

Your company uses Active Directory-integrated DNS. Users require access to the Internet. You run a network capture. You notice the DNS server is sending DNS name resolution queries to a server named f.root-servers.net. You need to prevent the DNS server from sending queries to f.root-servers.net. The server must be able to resolve names for Internet hosts. 
Which two actions should you perform？（）

Your network consists of a single Active Directory domain. The domain contains a server named Server1 that runs Windows Server 2008 R2. All client computers run Windows 7. 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？（）

Your network contains one Active Directory domain. You have a member server that runs Windows Server 2008 R2.You need to immediately disable all incoming connections to the server.
What should you do？（）

Your company has an IPv4 Ethernet network.A router named R1 connects your segment to the Internet. A router named R2 joins your subnet with a segment named Private1. The Private1 segment has a network address of 10.128.4.0/26. Your computer named WKS1 requires access to servers on the Private1 network. 
The WKS1 computer configuration is as shown in the following table.
Network  Addresses
IPv4 Address  10.128.64.113
Subnet mask  255.255.252.0
Default Gateway  10.128.64.1
The routers are configured as shown in the following table.
Router ID  Addresses
R1
interface 1
R1
interface 2 (To Internet)
10.128.64.1
131.107.108.37
R2
interface 1
R2
interface 2
10.128.64.10
10.128.4.1
WKS1 is unable to connect to the Private1 network by using the current configuration.You need to add a persistent route for the Private1 network to the routing table on WKS1.
Which command should you run on WKS1？（）

Your network uses IPv4. You install a server that runs Windows Server 2008 R2 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？（）

You have a DHCP server that runs Windows Server 2008 R2. 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？（）