For ensuring that network connectivity exists and is functioning properly, follow the steps outlined below for your respective operating system: Mac OS X
1. At the top of the screen, you should see toolbar resembling Figure 1.1. Click on the apple icon, then select System Preferences.
2. Next, select the icon for Network (located under the category Internet & Network) as detailed in Figure 1.2.
3. In the drop down area next to Show, click the area and choose Built-in Ethernet from the options given.
4. Click on the TCP/IP tab. Click on the button titled Configure IPv6. When a window is displayed (resembling the below image), click on the option Off then select OK.
5. Click on the TCP/IP tab. Make sure that the section marked Configure IPv4 is set to Use DHCP. If it isn’t, choose that selection from the drop-down menu adjacent to that section.

Windows XP
1. Click on the Start button located on the taskbar.
2. Choose the Control Panel from the menu given.
3. Under Pick a category, select the section marked Network and Internet Connections. If you do not see the window presented in Figure 2.3, go to step 5.
4. On the next screen , choose the selection titled Network Connections located under or Pick a Control Panel icon. Now, go to step 6.
5. Double-click on Network Connections.

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