2013 Latest MCTS 70-642 Exam Questions 306-310

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QUESTION 26
Your network contains a DNS server that hosts a zone for fabrikam.com. Dynamic updates are enabled on the zone.
The network contains a Web server named web1.fabrikam.com. Web1.fabrikam.com uses the 172.23.1.6
IP address.
Web1.fabrikam.com hosts three websites as shown in the exhibit. (Click the Exhibit button.)
You change the IP address of web1.fabrikam.com to 172.23.1.20.
After the change, users report that they cannot access Web2 and Web3. The users can access Web1. You change the IP address of web1.fabrikam.com to 172.23.1.6.
The users report that they can access all three websites.
You need to ensure that when you change the IP address of web1.fabrikam.com, the users can access all three websites.
What should you do?
Exhibit:
A. Change the host (A) records of web2.fabrikam.com and web3.fabrikam.com to service location (SRV)
records.
B. Restart the Netlogon service on web1.fabrikam.com.
C. Restart the DNS Client service on web1.fabrikam.com.
D. Change the host (A) records of web2.fabrikam.com and web3.fabrikam.com to canonical name
(CNAME) records.
Correct Answer: D
Explanation/Reference:
Correct answer(s): D

QUESTION 27
Your network contains an Active Directory domain named contoso.com. The domain contains two domain controllers named DC1 and DC2. The service location (SRV) records for both of the domain controllers have default values.
An SRV record for DC1 is shown in the exhibit. (Click the Exhibit button.)
You need to modify the SRV records to ensure that DC2 is contacted for authentication only when DC1 is unavailable.
What should you do?
A. Increase the weight value of the SRV records for DC2. B. Increase the weight value of the SRV records for DC1. C. Increase the priority value of the SRV records for DC1. D. Increase the priority value of the SRV records for DC2.
Correct Answer: D
Explanation/Reference:
Correct answer(s): D
Priority The priority of the server. Clients attempt to contact the server with the lowest priority.
Weight A load-balancing mechanism that is used when selecting a target host from those that have the same priority. Clients randomly choose SRV records that specify target hosts to be contacted, with probability proportional to the weight
http://technet.microsoft.com/en-us/library/cc961719.aspx

QUESTION 28
Your network contains two Active Directory domains named contoso.com and fabrikam.com. Each domain contains several domain controllers. All of the domain controllers are configured as DNS servers for their respective domain.
From a client computer in contoso.com, you discover that you cannot resolve host names in fabrikam.com. You need to ensure that the client computers in contoso.com can resolve host names in fabrikam.com. What should you do in contoso.com?
A. Create a conditional forwarder. B. Disable forwarders.
C. Modify the DNS suffix search order on all of the DNS servers. D. Create a reverse lookup zone.
Correct Answer: A

Explanation/Reference:
Correct answer(s): A

QUESTION 29
Your network contains an Active Directory domain named contoso.com.
A partner organization has an Active Directory domain named fabrikam.com. Your company plans to provide VPN access for fabrikam.com users.
You need to configure Network Policy Server (NPS) to forward authentication requests to fabrikam.com. What should you configure on the NPS server?
A. connection request policies
B. system health validators (SHVs) C. health policies
D. remediation server groups
Correct Answer: A
Explanation/Reference:
Correct answer(s): A
Connection request policies are sets of conditions and settings that allow network administrators to designate which Remote Authentication Dial-In User Service (RADIUS) servers perform the authentication and authorization of connection requests that the server running Network Policy Server (NPS) receives from RADIUS clients. Connection request policies can be configured to designate which RADIUS servers are used for RADIUS accounting.
Ref: http://technet.microsoft.com/en-us/library/cc753603.aspx

QUESTION 30
Your network contains an Active Directory domain named contoso.com.
The domain contains a server named Server3 that has the DHCP Server server role installed.
You need to configure Windows Firewall on Server3 to allow IPv4 client computers access to the DHCP Server service.
Which port or ports should you allow through Windows Firewall? A. TCP 53 and UDP 53
B. TCP 995
C. TCP 67 and TCP 68
D. UDP 995
E. TCP 993
F. TCP 587 and UDP 587
G. UDP 993
H. UDP 546 and UDP 547
I. TCP 1433
J. UDP 67 and UDP 68
K. TCP 546 and TCP 547
L. TCP 636
M. UDP 1433
Correct Answer: J
Explanation/Reference:
Correct answer(s): J
Use of well-known UDP ports for client/server communication
Both BOOTP and DHCP use the same reserved protocol ports for sending and receiving messages between servers and clients. Both BOOTP and DHCP servers use UDP port 67 to listen for and receive client request messages. BOOTP and DHCP clients typically reserve UDP port 68 for accepting message replies from either a BOOTP server or DHCP server.
Because DHCP and BOOTP messages use nearly identical format types and packet structures, and typically use the same well-known service ports, BOOTP or DHCP relay agent programs usually treat BOOTP and DHCP messages as essentially the same message type, without differentiating between them.
http://technet.microsoft.com/en-us/library/cc781243(v=ws.10).aspx

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