An access point for use in a wireless local area network, 'WLAN', said access point comprising: a radio transceiver; an Internet access port; and an Internet access controller; the access point being arranged in operation to exchange management frames with a wireless device (14, 15) to attach the wireless device (14, 15) to the WLAN; said access point being characterised by: further comprising a radio link tester arranged to, in response to the wireless device (14, 15) attaching to the WLAN, perform a radio link test comprising: controlling said radio transceiver to send a test frame requiring acknowledgement to the wireless device (14, 15), the test frame being of a length over 750 bytes, said length being greater than a respective length of each of the management frames; and determining whether the radio link test is passed or failed, wherein the radio link test is only passed if an acknowledgment of said test frame is received by the radio transceiver from the wireless device (14, 15); and said Internet access controller being arranged in operation to allow the wireless device (14, 15) to join the Internet via the Internet access port by controlling the radio transceiver to perform a message exchange with said wireless device (14, 15) to provide said wireless device (14, 15) with an Internet address, only when the radio link tester determines that the radio link test is passed,. a radio transceiver; an Internet access port; and an Internet access controller; the access point being arranged in operation to exchange management frames with a wireless device (14, 15) to attach the wireless device (14, 15) to the WLAN; said access point being characterised by: further comprising a radio link tester arranged to, in response to the wireless device (14, 15) attaching to the WLAN, perform a radio link test comprising: controlling said radio transceiver to send a test frame requiring acknowledgement to the wireless device (14, 15), the test frame being of a length over 750 bytes, said length being greater than a respective length of each of the management frames; and determining whether the radio link test is passed or failed, wherein the radio link test is only passed if an acknowledgment of said test frame is received by the radio transceiver from the wireless device (14, 15); and said Internet access controller being arranged in operation to allow the wireless device (14, 15) to join the Internet via the Internet access port by controlling the radio transceiver to perform a message exchange with said wireless device (14, 15) to provide said wireless device (14, 15) with an Internet address, only when the radio link tester determines that the radio link test is passed,. further comprising a radio link tester arranged to, in response to the wireless device (14, 15) attaching to the WLAN, perform a radio link test comprising: controlling said radio transceiver to send a test frame requiring acknowledgement to the wireless device (14, 15), the test frame being of a length over 750 bytes, said length being greater than a respective length of each of the management frames; and determining whether the radio link test is passed or failed, wherein the radio link test is only passed if an acknowledgment of said test frame is received by the radio transceiver from the wireless device (14, 15); and controlling said radio transceiver to send a test frame requiring acknowledgement to the wireless device (14, 15), the test frame being of a length over 750 bytes, said length being greater than a respective length of each of the management frames; and determining whether the radio link test is passed or failed, wherein the radio link test is only passed if an acknowledgment of said test frame is received by the radio transceiver from the wireless device (14, 15); and said Internet access controller being arranged in operation to allow the wireless device (14, 15) to join the Internet via the Internet access port by controlling the radio transceiver to perform a message exchange with said wireless device (14, 15) to provide said wireless device (14, 15) with an Internet address, only when the radio link tester determines that the radio link test is passed,.