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The following types of Internet connection services may be available from your ISP: . Fiber to the Home (FTTH) . Digital Subscriber Line (DSL) . Cable modem . Satellite . Dial-up For detailed information on devices required for Internet access and how to connect your computer to the Internet, ask your ISP. . To connect your computer to the Internet using the wireless LAN function, you need to set up the wireless LAN network. See Using the Wireless LAN (page 61) for more information. ! When you connect your computer to the Internet, be sure to take appropriate security measures to protect the computer against online threats. Depending on the service contract with your ISP, you may need to connect an external modem device, for example a USB telephone modem, a DSL modem, or a cable modem, to your computer to connect to the Internet. For detailed instructions on connection setups and modem configuration, see the manual that came with your modem. Using Your VAIO Computer > Using the Network (LAN) n 60 N Using the Network (LAN) You need the display/LAN adapter to connect your computer to 1000BASE-T/100BASE-TX/10BASE-T type networks with a LAN cable. Connect one end of a LAN cable (not supplied) to the network (LAN) port on the display/LAN adapter and the other end to your network. For detailed settings and devices required for LAN access, ask your network administrator. ! You cannot configure your network before connecting the display/LAN adapter to your computer. See Connecting a Display/LAN Adapter (page 92) for more information on the display/LAN adapter. . You can connect your computer to any network without changing the default settings. ! Do not plug a telephone cable into the network (LAN) port on the display/LAN adapter. If the network (LAN) port is connected to one of the telephone lines mentioned below, high electric current to the port may cause damage, overheating, or fire. -Home (intercom speakerphone) or business-use telephone lines (multi-line business telephone) -Public telephone subscriber line -Private branch exchange (PBX) Using Your VAIO Computer > Using the Wireless LAN n 61 N Using the Wireless LAN The Wireless LAN (WLAN) allows your computer to connect to a network through a wireless connection. The WLAN uses the following IEEE 802.11a/b/g/n standard, which specifies the type of technology used. See the specifications to find out about the configuration of your computer. WLAN standard Frequency band Remarks IEEE 802.11a 5 GHz - IEEE 802.11b/g 2.4 GHz The IEEE 802.11g standard provides higher-speed communications than the IEEE 802.11b standard. IEEE 802.11n 5 GHz/2.4 GHz On models compliant with the IEEE 802.11b/g/n standard, only the 2.4 GHz band can be used. Using Your VAIO Computer > Using the Wireless LAN n 62 N Notes on Using the Wireless LAN Function General notes on using the wireless LAN function . In some countries or regions, using WLAN products may be restricted by the local regulations (e.g. limited number of channels). . The IEEE 802.11a standard and the IEEE 802.11n standard are not available on ad-hoc networks. . The 2.4 GHz band, with which wireless LAN devices work, is used by various devices. Although the wireless LAN devices use the technology to minimize radio interference from other devices that use the same band, such radio interference may cause slower communication speeds and narrower communication ranges or communication failures. . The communication speed and range may vary depending on the following conditions: . Distance between communication devices . Existence of obstacles between devices . Device configuration . Radio conditions . Ambient environment that includes existence of walls and materials of such walls . Software in use . Communications may be cut off depending on radio conditions. . Actual communication speed may not be as fast as the one displayed on your computer. . Deploying WLAN products compliant with different standards that use the same band on the same wireless network may reduce the communication speed due to radio interference. Taking this into consideration, WLAN products are designed to reduce the communication speed to ensure communications with another WLAN product if it is compliant with a different standard that uses the same band. 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 63 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 specificat...
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