(A) 802.11b and 802.11g products can co-exist and should be interoperable on the same network. Unfortunately, not all implementations of 802.11b or 802.11bg were done correctly by some manufacturers. For the most part it WILL work, but there are exceptions. This is why the WiFi interoperability certification was created

(A) In its simplest form, a wireless access point is a bridge between wired Ethernet and wireless Ethernet (802.11b). An access point is not needed for two wireless computers to talk to each other, but it is vital for free communication between wired and wireless networks.

(A) No. All wireless cards can be put into an 'ad hoc' mode that allows them to communicate directly to each other. An access point is not needed. Use an access point only when you need to bridge your wireless network with your wired ethernet network.

(A) If you are using WEP (encryption) try turning it off. Encryption is sometimes hard to get running so you should start with it turned off. Once you get it running, READ THE INSTRUCTIONS again. Lastly, be sure you are not mixing encryption levels.