User manual SONY VAIO VGN-U750P

[. . . ] 1 Read this first Read this first Notice © 2004 Sony Corporation. This manual and the software described herein, in whole or in part, may not be reproduced, translated, or reduced to any machinereadable form without prior written approval. Sony Corporation provides no warranty with regard to this manual, the software, or other information contained herein and hereby expressly disclaims any implied warranties or merchantability or fitness for any particular purpose with regard to this manual, the software or such other information. In no event shall Sony Corporation be liable for any incidental, consequential, or special damages, whether based on tort, contract, or otherwise, arising out of or in connection with this manual, the software, or other information contained herein or the use thereof. [. . . ] Before you remove the Compact Flash Card, click the Compact Flash Card icon on the taskbar and close the card. Close any applications that use the Compact Flash Card before removing the card. Otherwise, data may be lost. 77 Using your VAIO computer Using Wireless LAN (WLAN) Thanks to Sony's Wireless LAN (WLAN), all your digital devices with built-in WLAN functionality communicate freely with each other through a powerful network. A WLAN is a network in which a mobile user can connect to a local area network (LAN) through a wireless (radio) connection. So there is no need any more to pull cables or wires through walls and ceilings. The Sony WLAN supports all normal Ethernet activities, but with the added benefits of mobility and roaming. You can still access information, internet/intranet and network resources, even in the middle of a meeting, or as you move from one place to another. You can communicate without an Access Point, this means that you can communicate between a limited number of computers (adhoc), or you can communicate through an Access Point, which allows you to create a full infrastructure network (infrastructure). 78 Using your VAIO computer In some countries, using WLAN products may be restricted by the local regulations (e. g. Therefore, before activating the WLAN functionality, read any regulatory information provided in the Safety Information booklet. Channel selection is explained further in this manual (see Wireless LAN channel selection). WLAN uses the IEEE 802. 11b/g standard, which specifies the technology. The standard includes the encryption method: Wired Equivalent Privacy (WEP), which is a security protocol and WiFi Protected Access (WPA - Proposed jointly by the IEEE and WiFi Alliance, WiFi Protected Access is a specification of standards based, interoperable security enhancements that increase the level of data protection and access control for existing WiFi networks. WPA has been designed to be forward compatible with the IEEE 802. 11i specification. It utilizes the enhanced data encryption TKIP (Temporal Key Integrity Protocol) in addition to user authentication using 802. 1X and EAP (Extensible Authentication Protocol)). 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. 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. Wireless LAN devices using the IEEE 802. 11g standard can only communicate with a device using the IEEE 802. 11b standard, not with the IEEE 802. 11a standard. IEEE 802. 11b: The standard speed is 11 Mbps, or about 30 to 100 times faster than a standard dial up. IEEE 802. 11g: The standard speed is 54 Mbps, or about 5 times faster than a Wireless LAN device using the IEEE 802. 11b standard. Communicating without 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. 79 Using your VAIO computer To communicate without Access Point (ad-hoc), proceed as follows: 1 2 3 4 5 6 7 8 9 Turn on the Wireless LAN switch. [. . . ] If you are not using the computer for an extended period of time, remove the battery pack from the computer to prevent damage to the battery. If, after fully charging the battery pack, the battery power is still low, the battery pack may be reaching the end of its life and should be replaced. You do not need to discharge the battery before recharging. If you have not used the battery pack for a considerable amount of time, recharge the battery. 141 Precautions On using headphones Road safety ­ Do not use headphones while driving, cycling, or operating any motorized vehicle. [. . . ]