Many Laptops come with both Wired Network Card and Wireless Card.
It is possible to establish priority to force the connetion through the card that you would like to work as default.
Windows TCP/IP stack can be configured with Network Metrics.
To prioritize the connection to default to the Wired card, put a Metrics of 10 in the Wired TCP/IP?s properties, and a Metrics of 20 in the Wireless.
When the Wire is unplugged to would have Wireless connection. When the Wired plug it would take over the connection since it as lower metrics.
1. In Control Panel, double-click Network Connections.
2. Right-click a network interfaces, and then clicks Properties.
3. Click Internet Protocol (TCP/IP), and then click Properties.
4. On the General tab, click Advanced.
5. To specify a metric, on the IP Settings tab, click to clear the Automatic metric check box, and then enter the metric that you want in the Interface Metric field.
Look like this.
http://www.ezlan.net/network/metrics.jpg
Reverse the numbers if you would like the Network connection to default to the Wireless Card.
Note the same configuration would work with a Desktop or any other computer that have dual Cards.
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