MCTS 70-642 Microsoft 70 642: Network Infrastructure 2 — Questions and Answers
Question 1: A network administrator needs to configure a Windows Server 2008 R2 server to forward DNS queries for an external domain to a specific DNS server. Which DNS feature should be used?
- Stub zone
- Conditional forwarder (Correct answer)
- Secondary zone
- Reverse lookup zone
Correct answer: Conditional forwarder
Conditional forwarders route DNS queries for specific domain names to designated DNS servers rather than using the standard resolution process.
Question 2: You are configuring DHCP on Windows Server 2008 R2. A client always needs the same IP address. Which DHCP feature should you configure?
- DHCP scope option
- DHCP reservation (Correct answer)
- DHCP exclusion range
- DHCP superscope
Correct answer: DHCP reservation
A DHCP reservation ties a specific IP address to a client's MAC address, ensuring the client always receives the same IP.
Question 3: Which Windows Server 2008 R2 feature allows you to combine multiple physical network adapters into a single logical adapter for fault tolerance?
- Network Load Balancing
- NIC Teaming (Correct answer)
- Failover Clustering
- Round Robin DNS
Correct answer: NIC Teaming
NIC Teaming (also called link aggregation) combines multiple NICs to provide redundancy and optionally increased bandwidth.
Question 4: An administrator wants to limit bandwidth usage for a specific application on Windows Server 2008 R2. Which feature should be configured?
- Quality of Service (QoS) Policy (Correct answer)
- Windows Firewall rule
- IPsec policy
- RRAS dial-up profile
Correct answer: Quality of Service (QoS) Policy
QoS Policy allows administrators to throttle or prioritize network traffic for specific applications or traffic types.
Question 5: Which DNS record type maps an IPv6 address to a hostname?
- A record
- PTR record
- AAAA record (Correct answer)
- MX record
Correct answer: AAAA record
The AAAA record (quad-A) maps a hostname to a 128-bit IPv6 address, analogous to how an A record maps to IPv4.
Question 6: A Windows Server 2008 R2 DHCP server is not issuing IP addresses to clients on a remote subnet. What must be configured on the router between the subnets?
- A DHCP scope for the remote subnet
- A DHCP relay agent or IP helper address (Correct answer)
- A secondary DHCP server on the remote subnet
- A DHCP superscope
Correct answer: A DHCP relay agent or IP helper address
A DHCP relay agent (or IP helper) forwards DHCP broadcast messages from clients to a DHCP server on a different subnet.
Question 7: Which command is used on Windows Server 2008 R2 to display the current DNS cache on a client?
- ipconfig /displaydns (Correct answer)
- nslookup /cache
- netsh dns show cache
- dnscmd /enumrecords
Correct answer: ipconfig /displaydns
The command 'ipconfig /displaydns' displays all entries currently stored in the DNS client resolver cache.
MCTS 70-642 Microsoft 70 642: Network Infrastructure 2
A network administrator needs to configure a Windows Server 2008 R2 server to forward DNS queries for an external domain to a specific DNS server.
Which DNS feature should be used?