2. An intern has been unsuccessful in attempts to resolve a network connectivity problem on a Windows 8 computer. The changes made to the computer have not been documented. You need to restore network connectivity for the computer. Objectives Create a simulated problem. Use Windows tools to determine the cause of the problem. Resolve the problem.

Task 1: Create a simulated problem.

The main tasks for this exercise are as follows:
1. Verify connectivity to LON-DC1.
2. Simulate the problem.
3. Test connectivity to LON-DC1.
4. Gather information about the problem.

Verify connectivity to LON-DC1

• On LON-CL1, map the drive letter P to \\LON-DC1\Data.

Simulate the problem

1. In the properties of Local Area Connection, disable the IPv6 protocol.
2. Run the file E:\LabFiles\Mod04\ Mod4-Script.bat.

Test connectivity to LON-DC1
• Access drive letter P by using Windows Explorer. Are you able to access the mapped drive P:?

Gather information about the problem
1. Open a command prompt, and then run the following commands:
   o ping lon-dc1
   o ping 172.16.0.10
   o IPConfig /all
2. What IP address is the computer using?
3. What subnet mask is the computer using?
4. What network is the computer on?

Task 3: Resolve the problem.

The main tasks for this exercise are as follows:
1. Resolve the first problem.
2. Test the first resolution.
3. Resolve the second problem.
4. Test the second resolution.

Resolve the first problem
• In the properties of Local Area Connection, modify TCP/IPv4 to use the subnet mask 255.255.0.0.

Test the first resolution
1. Access drive letter P by using Windows Explorer. Are you able to access mapped drive P:?
2. Open a command prompt, and at the command prompt, run the following commands :
   o ping lon-dc1.
   o ping 172.16.0.10.
   o IPConfig /all.
What DNS servers is the computer using?

Resolve the second problem
• In the properties of Local Area Connection, modify TCP/IPv4 and use the preferred DNS server
  172.16.0.10.

Test the second resolution
• Access drive letter P by using Windows Explorer. Are you able to access mapped drive P:?
  Results: After this exercise, you will have resolved the connectivity problem between LON-CL1 and LONDC1.
 
To prepare for the next module

When you are finished the lab, revert the virtual machines to their initial state.
1. On the host computer, start Hyper-V Manager.
2. In the Virtual Machines list, right-click 20687A-LON-CL1, and then click Revert.
3. In the Revert Virtual Machine dialog box, click Revert.
4. Repeat steps 2 and 3 for 20687A-LON-DC1.