Objective 5.3: Configure and Troubleshoot Remote Connections

As a DST, you will be required to troubleshoot and answer questions that users have regarding their remote connections to the company’s network. Because more and more employees are working from home, you should have a good understanding of how to configure workstations to use the dial-up features available in Windows XP. You should also understand how remote connections can be established across the Internet by using DSL or cable modems, and you should be able to answer end-user questions if problems arise.

To answer the questions in this objective, you should know how to troubleshoot modem problems and have an understanding of how users can configure their home or small business networks by using a DSL or cable modem.

Objective 5.3 Questions

1. You are a DST for a small college that has 20 workstations running Windows XP Professional. One of the evening instructors calls and says he is having problems using his modem to dial into the remote access server located at the university. What should be the first thing you ask the teacher to check?

   1. The Network Properties Configuration dialog box

   2. TCP/IP configuration

   3. Connections of the telephone cable

   4. The RAS (remote access server) IP address

2. You are a DST for a small Internet service provider (ISP). A user calls and asks how to connect his home business to the Internet. He has been using a digital subscriber line (DSL) for one of the computers, but he now wants the other two computers to have Internet connectivity. The user said that he made some changes to the router’s configuration, and now none of the computers can connect to the Internet. You have the user check the IP addresses on all the interfaces, and he tells you that they are 192.168.0.1, 192.168.0.2, 192.168.0.3 for the three workstation interfaces and that the router’s external interface has the IP address 192.168.0.100. What is the problem?

   1. The internal IP addresses are illegal.

   2. The external IP address must be 255.255.255.0.

   3. 192.168.0.1 is reserved for default gateway addresses.

   4. The external interface should be assigned a public IP address.

3. You are a DST for a small computer security company, and you support 10 investigators who all have laptop computers running Windows XP Professional. One of the investigators wants you to help her configure a new modem that she just purchased to connect to the Internet. The office telephone system requires a caller to dial the number 9 to get an outside line. How should you configure the modem to dial 9 before dialing the telephone number of the workstation that she is connecting to?

   1. Enter the number 9 followed by a semicolon in the Phone Number To Dial of the New Connection Wizard dialog box (for example, 9;555-1212).

   2. Enter the number 9 in the To Access An Outside Line For Local Calls, Dial: section of the General tab of the New Location dialog box.

   3. Enter the number 9 followed by a dash in the Phone Number To Dial of the New Connection Wizard dialog box (for example, 9-555-1212).

   4. The modem will autodetect the number to dial for an outside line.

Objective 5.3 Answers

1. Correct Answers: C

   1. Incorrect: Remember that the first thing you should check when a connection cannot be established is the physical components. Is the telephone cable plugged in to the telephone? Is the phone cable plugged in to the phone jack?

   2. Incorrect: The first thing you should check when a connection cannot be made is the physical components. Is the telephone cable plugged in to the telephone? Is the phone cable plugged in to the phone jack?

   3. Correct: The first thing you should check when a connection cannot be made is the physical components. Is the telephone cable plugged in to the telephone? Is the phone cable plugged in to the phone jack?

   4. Incorrect: The first thing you should check when a connection cannot be made is the physical components. Is the telephone cable plugged in to the telephone? Is the phone cable plugged in to the phone jack?

2. Correct Answers: D

   1. Incorrect: The internal IP addresses should be private addresses. The IP addresses configured on the internal interfaces are private (192.169.0.1 through 192.169.255.254). The problem here is that the external interface also has a private IP address. It should have a public IP address that is assigned by the ISP.

   2. Incorrect: The external IP address must be a public IP address. 255.255.0.0 is not allowable as a host IP address. It is a subnet mask.

   3. Incorrect: The internal IP addresses are private addresses, and the IP address 192.168.0.1 can be assigned to any host. The problem here is that the external interface also has a private IP address. It should have a public IP address that is assigned by the ISP.

   4. Correct: The problem here is that the external interface also has a private IP address. It should have a public IP address that is assigned by the ISP.

3. Correct Answers: B

   1. Incorrect: To enter additional numbers for outside local calls and long distance calls, enter the numbers in the Dial Rules section of the General tab of the New Location dialog box.

   2. Correct: To enter additional numbers for outside local calls and long distance calls, enter the numbers in the Dial Rules section of the New Location dialog box.

   3. Incorrect: To enter additional numbers for outside local calls and long distance calls, enter the numbers in the Dial Rules section of the General tab of the New Location dialog box.

   4. Incorrect: To enter additional numbers for outside local calls and long distance calls, enter the numbers in the Dial Rules section of the General tab of the New Location dialog box.