Appendix B | B |
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About Wireless LANs |
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BSS
BSS
A group of Wireless Stations and a single Access Point, all using the same ID (SSID), form a Basic Service Set (BSS).
Using the same SSID is essential. Devices with different SSIDs are unable to communicate with each other.
Channels
The Wireless Channel sets the radio frequency used for communication.
•Access Points use a fixed Channel. You can select the Channel used. This allows you to choose a Channel which provides the least interference and best performance. In the USA and Canada, 11 channel are available. If using multiple Access Points, it is better if adjacent Access Points use different Channels to reduce interference.
•In "Infrastructure" mode, Wireless Stations normally scan all Channels, looking for an Access Point. If more than one Access Point can be used, the one with the strongest signal is used. (This can only happen within an ESS.)
WEP
WEP (Wired Equivalent Privacy) is a standard for encrypting data before it is transmitted. This is desirable because it is impossible to prevent snoopers from receiving any data that is transmitted by your Wireless Stations. But if the data is encrypted, then it is meaningless unless the receiver can decrypt it.
If WEP is used, the Wireless Stations and the Access Point must have the same settings for each of the following:
WEP | Off, 64 Bit, 128 Bit | |
Key | For 64 Bit encryption, the Key value must match. | |
For 128 Bit encryption, the Key value must match | ||
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WEP Authentication | Open System or Shared Key. |
Wireless LAN Configuration
To allow Wireless Stations to use the Access Point, the Wireless Stations and the Access Point must use the same settings, as follows:
Mode | On client Wireless Stations, the mode must be set to "Infrastructure". |
| (The Access Point is always in "Infrastructure" mode.) |
SSID (ESSID) | Wireless Stations should use the same SSID (ESSID) as the Access Point |
| they wish to connect to, but the SSID can not set to be null (blank). |
WEP | The Wireless Stations and the Access Point must use the same settings |
| for WEP (Off, 64 Bit, 128 Bit). |
| WEP Key: If WEP is enabled, the Key must be the same on the |
| Wireless Stations and the Access Point. |
| WEP Authentication: If WEP is enabled, all Wireless Stations must |
| use the same setting as the Access Point (either "Open System" or |
| "Shared Key"). |