Certifiable Q&A for December 15, 2000

Welcome to Certifiable, your exam prep headquarters. Here you'll find questions about some of the tricky areas that are fair game for the certification exams. Following the questions, you'll find the correct answers and explanatory text. We change the questions biweekly.

Apparently, testing centers are filled to capacity with people trying to take the Windows NT 4.0 exams before Microsoft retires them. I know that it took me more than 20 minutes on hold to reach someone on the phone at Prometric and that the local testing centers have severely limited openings for the next 2 weeks. Fortunately, Microsoft has decided to extend the availability of the NT 4.0 exams until the end of February. Go to the Microsoft Training & Certification site for details.

Microsoft also has recognized that eliminating the NT 4.0 exams in favor of the Windows 2000 exams isn't going to convince companies to stop using NT 4.0. On the site mentioned above, the company announces that it is creating a new NT 4.0 exam specifically for those people who will continue to support NT 4.0. Unfortunately, this exam won't count toward MCSE certification. The small bit of good news is that anyone who passes the exam will earn the Microsoft Certified Professional (MCP) certification.

The questions this week are for those of you who are attempting to pass Exam 70-059: Internetworking with Microsoft TCP/IP on Microsoft Windows NT 4.0 before it retires because you know you'll still be using NT 4.0 next year. I tried to pick questions that covered the topics I found most difficult when I took the exam.

Good luck to all of you who are making a mad dash toward certification!

Questions (December 15, 2000)
Answers (December 15, 2000)

Questions (December 15, 2000)

Question 1
Scenario: The company network is routed and consists of 20 UNIX machines, 30 Windows NT 4.0 Servers, 50 NT Workstations, and 1000 Windows 95 machines. Your goal is to have these machines communicate with one another. Routers connect the 15 subnets, but one of the NT servers will act as a router.

Required Objective:

  • To have the NT server act as a router between two subnets and have the route table updated automatically.

Optional Objectives:

  • To have the Windows machines initiate sessions with the servers using NetBIOS names.
  • To enable the UNIX machines and the Windows machines to communicate using the FTP command. This includes the ability for both Windows and UNIX machines to initiate FTP sessions.

Proposed Solution:

  • Enable the routing by placing multiple network adapters in the NT server and configuring each with a different IP address. For card 1, the IP address will be; for card 2, the address will be These addresses are appropriate for the subnets to which the cards are cabled. The subnet mask is
  • On the NT server, select "Enable IP Forwarding" on the Routing tab of the Microsoft TCP/IP Properties dialog box.
  • Install the Routing Information Protocol (RIP) for Internet Protocol Service on the Services tab of the Control Panel Network applet.
  • Manually configure appropriate IP addresses and masks on all of the clients. Configure two of the NT servers to be WINS servers.
  • Add the addresses of the WINS servers to the Windows client configurations.
  • Add the DNS server service on one of the NT servers.
  • Create a zone that will include A records for all of the UNIX machines.
  • Enable WINS lookup for the zone.
  • Add the address of the WINS server.
  • Configure all of the Windows and UNIX machines as DNS clients and provide the DNS server as their primary server.

Which of the following statements is true about the proposed solution:

  1. It achieves the required objective but doesn't achieve either of the optional objectives.
  2. It achieves the required objective and one of the optional objectives.
  3. It achieves the required objective and both of the optional objectives.
  4. It doesn't achieve the required objective.

Question 2
Which of the following lets clients using TCP/IP browse shared resources on remote subnetworks? (Choose all that apply.)

  1. WINS
  2. DHCP
  3. NetBIOS
  4. LMHOSTS files

Question 3
You are the administrator for a real estate company that has one main office and 12 small offices at remote locations. Each remote office has a Windows NT Server with a 56Kbps modem and a dedicated phone line used to connect the remote office network to the main office network. Agents at the remote offices send and receive email through an Exchange Server located at the main office and access the Internet through a DSL connection at the main office. Which of the following provides more efficient use of the slow WAN link for DNS traffic? (Choose all that apply.)

  1. Disable WINS lookup on the DNS server.
  2. Provide a caching-only server at the remote site.
  3. Configure a secondary server at the remote site.
  4. Break your organization into multiple domains, one for each remote site.
  5. Have only one DNS server for your organization.

Answers (December 15, 2000)

Answer to Question 1
The correct answer is C—It achieves the required objective and both of the optional objectives. You've taken all the steps to enable dynamic routing, and the interface addresses are compatible with the mask that has been assigned. You have properly configured your NT server as a router whose route table will be updated automatically. By installing WINS and configuring the Windows clients to use WINS, you've met the first optional objective. You'll be able to communicate with the NT machines using the NetBIOS or machine names because WINS will resolve and return the IP addresses.

You have accomplished the second optional objective by installing a DNS server. The Windows machines can resolve the host name to IP address of the UNIX machines because the records will be part of the zone file. This will let them initiate an FTP session using the host name. The UNIX machines will be able to resolve the Windows machine names because the DNS zone will be configured to query the WINS server for the IP address of the Windows machines.

Answer to Question 2
The correct answers are A—WINS, and D—LMHOSTS files. Because broadcasts aren't routed, you must configure hosts to use WINS or an LMHOSTS file to enable browsing and domain activity across subnets. You can solve browsing problems by using WINS or the LMHOSTS file. However, if your router can forward NetBIOS name broadcasts, you don't need to use either WINS or the LMHOSTS file.

Answer to Question 3
The correct answer is B—Provide a caching-only server at the remote site. Caching-only servers aren't authoritative for any domain and must "learn" each address through queries. The traffic is greatly reduced once the caching-only server has built up a store of information and can answer queries from cached information. A caching-only server generates no zone transfer traffic.

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