Cisco 4400 validating identity radius

You might have heard that microwave ovens can leak radiation into this part of the radio spectrum, but vendors report that microwave leakage hasn't been a major disruption.

However, as WLANs, 2.4GHz cordless phones, and Bluetooth devices increase in popularity, interference in this limited spectrum space could reduce the performance of WLANs.

Still, street prices for wireless NICs run between 0 and 0, which is at least three times the cost of wired NICs, and access points (i.e., base stations that connect to your wired network) cost anywhere from 0 to 0.

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If and when the IEEE 802.11 Task Group G ratifies a 2.4GHz 54Mbps WLAN standard and a sufficient number of 802.11g-compliant products reach the market, I expect WECA to serve a similar interoperability-certification role for these products.

In typical indoor office conditions, an 802.11b wireless-LAN­equipped PC might be able to communicate with an access point that's 300 feet away; the raw data rate might start at 11Mbps, then drop to about 5.5Mbps beyond 100 feet, then to about 2Mbps, and finally to 1Mbps at the outer coverage limit.

Preliminary data from 802.11a vendors implies a similar range (with raw data rates from 54Mbps to 6Mbps, depending on signal quality), but the laws of physics suggest that all else being equal, doubling the operating frequency could cut range by 50 percent or more, depending on the number and type of obstructions.

Before you invest in wireless networking, you should test products in your environment to locate and alleviate interference sources.

Although 802.11a and 802.11b are marketed as 54Mbps and 11Mbps standards, respectively, the high overhead of their wireless protocols reduces their effective throughput to roughly 27Mbps and 6Mbps, respectively, under the best conditions.