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Technology & Digital Applications Flashcards

7 cards from real MCTS 70-642 practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  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?

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

    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.

  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?

    Answer: Create a reservation with an invalid IP for the client

    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.

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

    Answer: Stateless Address Autoconfiguration (SLAAC)

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

  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?

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

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

  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?

    Answer: nslookup hostname

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

  6. Which DNS record type is used to map an IPv6 address to a hostname in a forward lookup zone?

    Answer: AAAA

    AAAA records store 128-bit IPv6 addresses and are the IPv6 equivalent of the A record used for IPv4.

  7. A company wants to implement Network Access Protection (NAP) using 802.1X enforcement. Which server role component must be installed and configured as the policy enforcement point?

    Answer: Network Policy Server (NPS)

    NPS acts as the RADIUS server and NAP policy server, enforcing health policies for 802.1X-connected clients.