MCTS 70-642 Technology & Digital Applications 2

Question 1

A Windows Server 2008 R2 DHCP server is not issuing addresses to clients on a remote subnet. The router between the subnets supports RFC 3046. What must be configured to resolve this?

Accepted Answer

Add a DHCP scope for the remote subnet and configure a DHCP relay agent

Answer

A DHCP relay agent (or IP helper address) must forward DHCP broadcasts across routers, and a scope covering the remote subnet must exist on the DHCP server.

Question 2

You need to prevent a specific client from receiving a DHCP lease while still allowing all other clients on the subnet to obtain addresses. What is the most efficient approach?

Accepted Answer

Create a reservation with an invalid IP for the client

Answer

Creating a reservation tied to the client's MAC address with an address outside the scope effectively blocks it while keeping the scope intact for other clients.

Question 3

Which Windows Server 2008 R2 feature allows administrators to assign IPv6 addresses automatically to hosts that do not support DHCPv6?

Accepted Answer

Stateless Address Autoconfiguration (SLAAC)

Answer

SLAAC allows IPv6 hosts to self-configure addresses using the network prefix advertised by routers without a DHCPv6 server.

Question 4

An administrator configures a secondary DNS zone on a Windows Server 2008 R2 server. The zone fails to transfer from the primary. What is the most likely cause?

Accepted Answer

The secondary server's IP is not listed in the primary zone's Name Servers tab or zone transfer settings

Answer

By default, zone transfers are restricted to servers listed in the Name Servers tab or explicitly allowed in zone transfer settings on the primary.

Question 5

A technician needs to verify that DNS name resolution is working correctly for an internal hostname on a Windows Server 2008 R2 network. Which command provides the most detailed diagnostic output?

Accepted Answer

nslookup hostname

Answer

nslookup queries the DNS server directly and displays the server used, the resolved name, and the returned IP address.

MCTS 70-642 Exam Practice Test

MCTS 70-642 Exam Practice Test

MCTS 70-642 Technology & Digital Applications 2