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3. A DNS server with no zones that services client name resolution requests.
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4. A DNS server that sends all name resolution requests for a specific domain to another server.
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1. Which of the following DNS zone types cannot be stored in the Active Directory database a. Primary b. Secondary c. Stub d. None of the above
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Planning a Name Resolution Strategy
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2. Storing DNS resource records in the Active Directory database eliminates the need for which of the following (Choose all correct answers.) a. Stub zones b. Secondary zones c. Zone transfers d. Primary zones
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3. The DNS namespace for a company consists of one second-level domain, which has three child subdomains. Each of the three child subdomains also has three subdomains, at the fourth level. What is the maximum number of domains that you can include in a zone that does not contain the second-level domain a. 1 b. 3 c. 4 d. 12
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Lesson 4 Review
1. Why would you need an Lmhosts file on a computer that is already capable of using the broadcast method for NetBIOS name resolution
The Lmhosts file enables the computer to resolve the NetBIOS names of computers on other networks, which broadcasts cannot do.
2. Which type of WINS replication partner is preferable when the two servers are connected by a slow WAN link
A pull partner is preferable.
3. Which Lmhosts extension enables you to access an Lmhosts file on a shared network drive a. #DOM b. #INCLUDE c. #PRE d. \0nn
Questions and Answers
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Lesson 5 Practice
For each of the following DNS security techniques, specify which types of attack they help to prevent: DoS, IP spoofing, redirection, footprinting. (Choose all correct answers.) 1. Using only secure dynamic updates
Redirection
2. Installing redundant DNS servers on different networks
3. Encrypting zone transfer traffic
Footprinting
4. Using Active Directory-integrated zones
IP spoofing, footprinting
5. Preventing cache pollution
Redirection
6. Restricting zone transfers to specific IP addresses
Footprinting
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Lesson 5 Review
1. Which of the following forms of protection does Active Directory provide when you create Active Directory-integrated zones instead of file-based zones (Choose all correct answers.) a. Cache pollution prevention b. Encrypted zone replication c. Authenticated zone replication d. Secure dynamic updates
b and c
2. The DNS Update standard was developed as a response to the widespread use of which of the following a. Active Directory b. DHCP c. Zone transfers d. Protocol analyzers
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4
Planning a Name Resolution Strategy
3. Using your ISP s DNS servers as a redundant name resolution mechanism helps to combat which type of attack
Denial-of-service (DoS)
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Lesson 6 Review
1. A DNS server that can resolve names for which it is the authority, but not other names, is experiencing a failure in which of the following processes a. Zone transfer b. Dynamic update c. Authentication d. Recursion
2. Which of the following is not a reason for a DNS server to supply an incorrect IP address for a name for which it is authoritative a. An incorrect IP address in the root hints list. b. A zone transfer failed to occur. c. A dynamic update failed to occur. d. A typographic error in a resource record.
3. When a client can successfully ping a DNS server, but fails to receive any response to a name resolution query from that server, which of the following might be the cause of the problem a. The server is not the authority for the requested name. b. The server s cache is polluted. c. The DNS Server service is not started. d. The server has an incorrect IP address.
Questions and Answers
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Case Scenario Exercise
Given the information provided in the Case Scenario Exercise, answer the following. 1. Which of the following domain naming solutions is most suitable for the company network a. Use the litware.com domain for the company s Internet servers and for the enterprise network s internal Active Directory domain. b. Use the litware.com domain for the company s Internet servers and create an internal.litware.com domain for the enterprise network s Active Directory servers. c. Create an external.litware.com domain for the company s Internet servers and an internal.litware.com domain for the enterprise network s Active Directory servers. d. Use the litware.com domain for the company s Internet servers and register a new domain called litware-int.com for the enterprise network s Active Direc tory servers.
2. Which of the following zoning solutions provides the most security for the internal network and Web servers a. Connect one of the Active Directory domain controllers to the same network as the Web servers and create an Active Directory-integrated primary zone for the litware.com domain. b. Connect one of the Active Directory domain controllers to the same network as the Web servers and create a file-based primary zone for the litware.com domain. c. Install the DNS Server service on one of the Web servers and create a filebased primary zone for the litware.com domain. d. Connect a new computer running Windows Server 2003 to the same network as the Web servers, install the DNS Server service, and create a file-based pri mary zone for the litware.com domain.
3. In the company s Active Directory deployment plan, each of the other Litware Inc. offices is to be responsible for maintaining its own DNS records, once they deploy their own Active Directory domain controllers. Which of the following DNS namespace designs would best facilitate this intention a. Create a separate third-level domain beneath litware.com for each of the Litware Inc. offices. Create a separate file-based primary zone for each thirdlevel domain at the home office, and a file-based secondary zone at each branch office for that office s domain only. Then give the administrators at each office permission to modify the zone on their local domain controller.
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