If you’re unable to access the Internet on the wired network, first check the network cable connection.
For the wireless network, please first verify your AirPort icon should be displayed as on the menu bar.
Next to check your computer has been assigned an IP address:
1. Select the Finder icon (on the Dock)

2. From the menu bar, click on Go and then Utilities

3. Next run Network Utility application

4. Check that your IP address is in the form of 155.69.x.x or 172.x.x.x under the Info tab as shown. Your link status should show Active too. If your link status shows Inactive, please check your network cable connection or AirPort connection again.

5. If the IP address is in order, you may want to perform a ping test. To do so click on the Ping tab. Enter url or web address (www.yahoo.com) and click on Ping. You should see the reply messages as shown.

6. Successful use of ping indicates that the IP configuration of your system is probably functional.

Make sure you disable or uninstall any PPPoE software such as WinPoet, Broadjump, or Enternet 300 from your computer or you will not be able to connect to the Internet. Do not disable until you´ve downloaded the firmware in Step 1. Please make sure that your modem is not also a router. If it is or you do not know, please contact your ISP and change the modem to Bridge mode.Note: In some areas, BellSouth and Verizon may not use PPPoE. If you receive a dynamic IP address, please click here for setup instructions.

Step 1 Upgrade to the latest firmware.

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netsh is a wide-ranging command-line diagnostic tool that has an exceedingly large number of commands available. The most useful of the netsh commands are the netsh diag commands. Use them to find out information about your PC’s network setup, such as finding the IP address of its mail server, newsgroup server, DNS server, and similar resources.

There are two ways to use netsh: directly from the command line with all its switches, or first getting to the netsh console by typing netsh at the command line and then typing the command from the netsh> prompt that appears. For example, you could type netsh diag show adapter at the command line, which lists every network adapter on your PC, or you could get to the netsh> prompt and type diag show adapter.

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Linux is all about choice, and this extends to the technology that makes the file system work. Unlike with Windows, where you can choose between just NTFS and FAT32 (with the emphasis being on NTFS), Linux offers many different types of file system technology. Each is designed for varying tasks. Most are scalable, however, which means that they will work just as happily on a desktop PC as on a massive cluster of computers.
Fedora uses the ext3 file system. This is a popular choice among distros, although the SUSE distro uses the
reiserfs system. People are constantly arguing about which file system is best. The principal measuring stick is performance.

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