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B-6 Psion Teklogix Omnii XT10 Hand-Held Computer User Manual

Appendix B: Wireless Zero Config

Wireless Information Tab

• Ad Hoc And Infrastructure: If you are using an Infrastructure network—one in which

the hand-helds must pass data through an access point—leave the checkbox next to This

is an ad hoc network blank.

If you are using an Ad Hoc network—a network in which the hand-helds pass data

directly to other Ad Hoc devices without an access point—add a checkmark in the

checkbox next to This is an ad hoc network to enable Ad Hoc.

• Encryption: WEP (Wired-Equivalent Privacy) encryption prevents others from acci-

dentally accessing your network. If you are not using encryption, you can choose

Disabled from the drop-down encryption menu. Otherwise, leave this field as is.

AES (Advanced Encryption Standard) is a standard for protecting data through encryp-

tion. AES supports key sizes of 128 bits, 192 bits and 256 bits and will serve as a

replacement for the Data Encryption Standard (DES), which has a key size of 56 bits. In

addition to the increased security that comes with larger key sizes, the AES algorithm is

a symmetrical block cipher that can encrypt (encipher) and decrypt (decipher)

information.

• Authentication: 802.11 supports several subtypes of network authentication services:

Open, Shared, WPA, and WPA-PSK. Under Open authentication, any wireless station

can request authentication. The station that needs to authenticate with another wireless

station sends an authentication management frame that contains the identity of the

sending station. The receiving station then sends back a frame that indicates whether it

recognizes the identity of the sending station.

Under Shared authentication, each wireless station is assumed to have received a secret

shared key over a secure channel that is independent from the 802.11 wireless network

communications channel.

Under WPA and WPA-PSK authentication, the use of 802.1x authentication is required.

For wireless networks without a Remote Authentication Dial-In User Service

(RADIUS) infrastructure, WPA supports the use of a preshared key. For wireless net-

works with a RADIUS infrastructure, Extensible Authentication Protocol (EAP) and

RADIUS is supported.

• Network Key: This text box is used to specify a 5 or 13 ASCII character sequence or an

equivalent 10 or 26 Hexadecimal digit sequence that matches the active WEP key on the

access point.

To assign a Network key, highlight The key is provided automatically, and uncheck

the checkbox to disable this option.

Important: Keep in mind that Omnii will only communicate with access points that are

configured with the same SSID.

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