eMachines EL1331-03 - Desktop PC, Руководство пользователя

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Chapter 5: Networking Your Computer
48
Wireless Ethernet standards
Current wireless Ethernet standards include the following:
•
802.11a — 54Mbps
•
802.11b — 11Mbps
•
802.11g — 54Mbps
•
802.11n — 540Mbps
Speed is not the only issue if you decide to use equipment with different standards. Compatibility
can also be an issue. Take the following into consideration when you purchase wireless equipment:
Using an access point
An access point is a small electronic device that serves as the central control point for your network.
You connect your modem to the access point, set up a network connection, then browse the
Internet, send e-mail, share files and folders with other networked computers, and access other
devices, like a printer or scanner.
Equipment you need for an access point-based network
For a wireless Ethernet network you need:
•
Your Gateway computer with wireless networking installed
•
A broadband Internet connection (optional)
•
An access point
Access point Wireless cards supported
802.11a 802.11a only
802.11b 802.11b only
802.11g 802.11b and 802.11g
802.11n 802.11b, 802.11g, and 802.11n
Tip
When you buy your access point, make sure it has:
• IEEE 802.11n support. 802.11n is the fastest method for wireless communications. 802.11n is compatible with the older
IEEE 802.11g and IEEE 802.11b formats but not with the competing IEEE 802.11a format. Make sure that you get the
correct format that matches your computer.
• DHCP server/dynamic IP address assignment capability that makes it easier to set up and access your network.
• Internet security features like a firewall to keep intruders out of your network.
• Wireless security features like SecureEasySetup™ or 128-bit WEP encryption.
Cable or DSL modem
Access point
8512780.book Page 48 Tuesday, October 23, 2007 10:24 AM