Sony VGX-TP1 - Manual (Page 75)

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Using Your VAIO Computer
To communicate without an access point (ad-hoc)
!
You cannot select the 5 GHz bandwidth, which is used for the IEEE 802.11a standard, on ad-hoc networks.
1 Turn on the WLAN switch.
The Wireless LAN indicator lights up.
2 Click Start and Control Panel.
3 Click View network status and tasks under Network and Internet.
4 Click Set up a connection or network on the left pane.
The Set up a connection or network window appears.
5 Select an option to specify the ad-hoc network settings and click Next.
6 Follow the on-screen instructions.