1.
Karl is a network administrator. He's been asked to implement dynamic IP addressing the company's newly installed network, which has two subnets in one Active Directory domain with servers running Windows Server 2003. After Karl installs and configures the DHCP server in SubnetA, client computers in SubnetA are able to obtain DHCP leases and the proper TCP/IP configuration. What is the most likely cause of the problem?
Correct Answer
D. A DHCP Relay Agent is not installed in SubnetB
Explanation
Answer D is correct. A DHCP Relay Agent (or a BOOTP-compatible router) must be installed in SubnetB to route DHCP broadcast messages between networks.
2.
Frank's computer is configured to use DHCP. When Frank logs on, he notices he can't connect to the network. The computer has no IP address according to ipconfig. Which of the following is most likely true?
Correct Answer
C. The network cable to the computer is disconnected
Explanation
Answer C is correct. APIPA requires an active network connection (in most cases) for automatic configuration to work properly. If the network cable to a computer is disconnected or improperly connected, the computer may no be assigned an IP address. When you type ipconfig /all at a command prompt, you may see an error stating "Media Disconnected."
3.
The company has two subnets in one Active Directory domain with servers running Windows Server 2003. On the DHCP server, Scope1 provides dynamic addressing for SubnetA, and Scope2 provides dynamic addressing for SubnetB. Client in SubnetA are able to obtain DHCP leases, but are unable to access resources in SubnetB. What is the best way to solve the problem?
Correct Answer
E. Configure the TCP/IP router option for Scope1
Explanation
Answer E is correct. If client computers have an improperly configured gateway, they are not able to access resources outside of their local subnet. The best way to solve this problem is to configure the TCP/IP router option (option 003) for Scope1. Although you could configure a default gateway on client computers, this is not the best way to solve the problem, so Answer D is incorrect.
4.
Which of the following is most likely tru if a computer with an IP address of 169.254.201.10?
Correct Answer
A. No DHCP server is on the network
Explanation
Answer A is correct. When DHCP is configured but not available, or the client lease is expired and cannot be renewed, clients use Automatic Private IP Addressing. Whith APIPA, clients assign themselves an IP address in the range of 169.254.0.1-169.254.255.254, with a subnet mask of 255.255.0.0.
5.
April is a network administrator for an Acitve Directory domain with servers running Windows Server 2003. April recently installed a second DHCP server on the local subnet. When testing the server, she notices the DHCP Server service is being shut down and she can't get the service to stay running. What is the most likely cause of this problem?
Correct Answer
D. The DHCP server has not be authorized in Active Directory
Explanation
Answer D is correct. With Windows 2000 and later, a workgroup or stand-alone DHCP server configured on the same subnet as a domain's authorized DHCP server is considered to be a rogue server. As part of a network protection process, the rogue server automatically stops its DHCP Server service and stops leasing IP addresses to clients. To resolve this issue, you must authorize the DHCP server in Active Directory.
6.
Carlos is responsible for the managing DHCP. The organization has a single Class C subnet with 254 available IP addresses. the network ID is 192.168.10.0. Carlos wants a single scope to cover all 254 IP addresses. However, he needs to ensure 14 of the IP addresses aren't used by DHCP clients and that 8 of the IP addresses are always assigned to the same member servers. Which of the following should be done to configure the scope? (Choose Two)
Correct Answer(s)
B. Create the scope for the IP address range 192.168.10.1-192.168.10.254
D. Create an exclusion range for the 14 member servers and reserve the other 8 IP addresses
Explanation
Answer B and D are correct. The assignable IP address for the network is 192.168.10.1 to 192.168.10.254. To ensure a client computer gets the same IP address, create a reservation on a lease. To ensure an IP address is not used, create an exclusion.
7.
You want to configure multiple standard scopes so that they can be easily activated or deactivated. What should you do?
Correct Answer
B. Create a superscope and add the standard scopes to it
Explanation
Answer B is correct. A superscope is a container for scopes that allows you to more easily work with multiple scopes. After you create a superscope, you can add to it the scopes you want to manage as a group.
8.
The network has three subnets: SubnetA, SubnetB, and SubnetC. The DHCP server on SubnetA is configured with one scope for each subnet. The network administrator configured the TCP/IP settings using Server options, which works fine for Clients on SubnetA, but not for clients on SubnetB and SubnetC. What should be done to resolve this problem?
Correct Answer
A. Set scope options for the SubnetB and SubnetC scopes as appropriate to override server options
Explanation
Answer A is correct. The clients on SubnetB and SubnetC are likely getting the wrong TCP/IP router option. By setting the correct TCP/IP router option as a scope option, you can override the server options for the settings.
9.
What step does a DNS client perform first to resolve a DNS name?
Correct Answer
A. The client checks its local DNS resolver cache
Explanation
Answer A is correct. DNS clients check their local DNS resolver cache before sending queries to DNS servers.
10.
Which of the following correctly describes recursive and iterative queries? (Choose Two)
Correct Answer(s)
A. A DNS server must respond directly to a recursive query or return an error, and queries other DNS servers on behalf of the client if unable to resolve a query from its cache/zone database
D. A DNS server must resolve an iteractive query from its local cache/zone database or refer the client to another DNS server
Explanation
Answer A and D are correct. With a recursive query, the DNS server must respond directly to a recursive query or return an error, and queries other DNS servers on behalf of the client if unable to resolve a query. With an iterative query, a DNS server attempts to resolve the query from its records or from its cache, and if it is unable to resolve the query, the server can refer the client to another DNS server.