I have installed Oracle Linux 6 (X86_64) on my system. My system is Dell Inspiron 1564 and it is 32 bit. While installation I choosed Oracle Linux Server and UEK as another option. Operating system got installed properly but wi-fi is not working. While starting OS with UEK kernel, I am getting a message in NetworkManager applet that Device is not ready: firmware missing. Generally in my other system, this NetworkManager applet shows all available wi-fi connections.
On executing ipconfig, output doesnt have eth0 series.
I did a quick search and many of those model Dells are equipped with a Broadcom chipset. You can verify what chipset you have with the lspci command. You may find this link useful if your laptop is equipped with one of the BCM43xx chipsets.