Updating your network card's drivers often helps resolve connectivity issues.
If you are using a Mac simply keep up to date with Apple's updates will also keep your drivers up to date.
For a windows based system going through Windows update will often get you the latest drivers.
|1. From the Start Menu, right click "Computer" and select Properties|
|2. Click on Device Manager|
|3. Click on Network Adapters|
|4. Right click on your network card select Properties|
|5. Click on the tab labeled "Driver" then click "Update Driver".|
|6. Select "Search automatically for updated driver software".|