Can i connect to an ieee 802.11a device – Sony VGN-S170P User Manual
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Can I connect to an IEEE 802.11a device?
Computers with built-in wireless LAN support only the IEEE 802.11b and IEEE 802.11g standards (selected models only).
Devices connecting to a wireless LAN using the IEEE 802.11a standard cannot connect to devices using the IEEE 802.11b/g
standards.
Page 176
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