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When the communication speed is not as fast as expected, changing the wireless channel on the access point may increase the communication speed. Using Your VAIO Computer > Using the Wireless LAN n 49 N Note on the data encryption The WLAN standard includes the encryption methods: Wired Equivalent Privacy (WEP), which is a security protocol, Wi-Fi Protected Access 2 (WPA2), and Wi-Fi Protected Access (WPA). Proposed jointly by the IEEE and Wi-Fi Alliance, both WPA2 and WPA are specifications of standards based on interoperable security enhancements that increase the level of data protection and access control for existing Wi-Fi networks. WPA is designed to be forward compatible with the IEEE 802.11i specification. It utilizes the enhanced data encryption Temporal Key Integrity Protocol (TKIP) in addition to user authentication using 802.1X and Extensible Authentication Protocol (EAP). Data encryption protects the vulnerable wireless link between clients and access points. Besides that, there are other typical LAN security mechanisms to ensure privacy, such as: password protection, end-to-end encryption, virtual private networks, and authentication. WPA2, the second generation of WPA, provides stronger data protection and network access control and is also designed to secure all versions of 802.11 devices, including 802.11b, 802.11a, 802.11g, and 802.11n standards, multi-band and multi-mode. In addition, based on the ratified IEEE 802.11i standard, WPA2 provides government grade security by implementing the National Institute of Standards and Technology (NIST) FIPS 140-2 compliant AES encryption algorithm and 802.1X-based authentication. WPA2 is backward compatible with WPA. Using Your VAIO Computer > Using the Wireless LAN n 50 N Starting Wireless LAN Communications You first need to establish wireless LAN communications between your computer and an access point (not supplied). See Windows Help and Support for more information. ! 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. To start wireless LAN communications Turn on the WIRELESS switch. Make sure the WIRELESS indicator light turns on. Using Your VAIO Computer > Using the Wireless LAN n 51 N Stopping Wireless LAN Communications To stop wireless LAN communications Turn off the WIRELESS switch. Make sure the WIRELESS indicator light turns off. ! Turning off the wireless LAN function while accessing remote documents, files, or resources may result in data loss. Using Your VAIO Computer > Using the BLUETOOTH Function n 52 N Using the BLUETOOTH Function You can establish wireless communications between your computer and other BLUETOOTH® devices such as another computer or a mobile phone. You can transfer data between these devices without cables at a range of up to 10 meters in an open area. BLUETOOTH Security The BLUETOOTH wireless technology has an authentication function, which allows you to determine with whom you choose to communicate. With the authentication function, you can prevent any anonymous BLUETOOTH devices from accessing your computer. The first time two BLUETOOTH devices communicate, a common passkey (a password required for authentication) should be determined for both devices to be registered. Once a device is registered, there is no need to re-enter the passkey. . The passkey can be different each time, but must be the same at both ends. For certain devices, such as a mouse, no passkey can be entered. Using Your VAIO Computer > Using the BLUETOOTH Function n 53 N Communicating with Another BLUETOOTH Device You can connect your computer to a BLUETOOTH device such as another computer, a mobile phone, a PDA, a headset, a mouse, or a digital camera without the use of any cables. To communicate with another BLUETOOTH device To communicate with another BLUETOOTH device, you first need to set up the BLUETOOTH function. For information on setting up and using the BLUETOOTH function, see Windows Help and Support. After setting up the BLUETOOTH function, turn on the WIRELESS switch. Make sure the WIRELESS indicator light turns on. Using Your VAIO Computer > Using the BLUETOOTH Function n 54 N Stopping BLUETOOTH Communications To stop BLUETOOTH communications Turn off the WIRELESS switch. Make sure the WIRELESS indicator light turns off. Using Your VAIO Computer > Using the BLUETOOTH Function n 55 N Notes on Using the BLUETOOTH Function . The data transfer rate varies, depending on the following conditions: . Obstacles, such as walls, located between devices . Distance between devices . Material used in walls . Proximity to microwaves and cordless telephones . Radio frequency interference and other environmental conditions . Device configuration . Type of software application . Type of operating system . Use of both wireless LAN and BLUETOOTH functions at the same time on your computer . Size of file being exchanged . Large files may occasionally be corrupted during conti...
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