Assessments - 1, GPA: 4
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WPA2 is backward compatible with WPA. * See the online Specifications to see whether your model supports the IEEE 802.11a standard. 5656n N Using Your VAIO Computer Wireless LAN devices using the IEEE 802.11a standard and the ones using the IEEE 802.11b or g standard cannot communicate because the frequencies are different. IEEE 802.11b: The standard speed is 11 Mbps, or about 30 to 100 times faster than a standard dial up. IEEE 802.11a/g: The standard speed is 54 Mbps, or about 5 times faster than a wireless LAN device using the IEEE 802.11b standard. The 2.4 GHz bandwidth used by wireless LAN compatible devices is also used by other various devices. Although technologies to minimize interference from other devices that use the same bandwidth are employed on wireless LAN compatible devices, such interference may cause lower communication speed, narrower communication range, or broken wireless connections. The communication speed varies depending on the distance between communication devices, existence of obstacles between such devices, the device configuration, the radio conditions, and the software in use. In addition, communications may be cut off depending on the radio conditions. The communication range varies depending on the actual distance between communication devices, existence of obstacles between such devices, the radio conditions, the ambient environment that includes existence of walls and materials of such walls, and the software in use. Deploying IEEE 802.11b and IEEE 802.11g products on the same wireless network may reduce the communication speed due to radio interference. Taking this into consideration, the IEEE 802.11g products are designed to reduce the communication speed to ensure communications with IEEE 802.11b products. When the communication speed is not as fast as expected, changing the wireless channel on the access point may increase the communication speed. 5757n N Using Your VAIO Computer Communicating without an Access Point (Ad-hoc) An ad-hoc network is a network in which a local network is created only by the wireless devices themselves, with no other central controller or access point. Each device communicates directly with other devices in the network. You can set up an ad-hoc network easily at home. . If the wireless connection is initiated by the VAIO computer, channel 11 will be selected. . If the wireless connection is initiated by peer wireless LAN equipment, the wireless LAN communication will make use of the channel selected by the peer wireless LAN equipment. 5858n N Using Your VAIO Computer To communicate without an access point (ad-hoc) 1 Turn on the WIRELESS or WIRELESS LAN switch. The Wireless LAN indicator lights up. On models that support the Bluetooth functionality* and/or the IEEE 802.11a/b/g standard*, double-click ( / ) on the taskbar to display the Wireless Device Switch window. Select your desired wireless option(s) and click OK. 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. * See the online Specifications to see whether your model supports the Bluetooth functionality and/or the IEEE 802.11a/b/g standard. 5959n N Using Your VAIO Computer Communicating with an Access Point (Infrastructure) An infrastructure network is a network that extends an existing wired local network to wireless devices by providing an access point (not supplied), for example the Sony Access Point. The access point bridges the wireless and wired LAN and acts as a central controller for the wireless LAN. The access point coordinates transmission and reception from multiple wireless devices within a specific range. The access point will select which channel to use on an infrastructure network. ! For details on how to select the channel that will be used by the access point, see the manual that came with your access point. 6060n N Using Your VAIO Computer To connect to a wireless network 1 Make sure an access point is set up. See the manual that came with your access point for more information. 2 Turn on the WIRELESS or WIRELESS LAN switch. The Wireless LAN indicator lights up. On models that support the Bluetooth functionality* and/or the IEEE 802.11a/b/g standard*, double-click ( / ) on the taskbar to display the Wireless Device Switch window. Select your desired wireless option(s) and click OK. 3 Click Start and Control Panel. 4 Click View network status and tasks under Network and Internet. 5 Click Manage wireless networks. 6 Click Add. 7 Follow the on-screen instructions. * See the online Specifications to see whether your model supports the Bluetooth functionality and/or the IEEE 802.11a/b/g standard. To disconnect from a wireless network Turn off the WIRELESS or WIRELESS LAN switch. ! Turning off the wireless L...
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