I recently switched over to ubuntu 12.04 from windows 7. After the switch I downloaded Broadcom Wireless STA driver from a wired connection which gave me the ability to actually get on the internet. However, although I can get on the internet it continues to drop periodically saying "Server Not Found" and a simple refresh of the page fixes the problem. Although annoying I could deal with this. But I am heavy usenet user and this makes for not being able to download things as well as any packages from the software center. I've included some information if any additional information is need let me know
@garrett:~$ lspci | grep -i net
03:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01)
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8101E/RTL8102E PCI Express Fast Ethernet controller (rev 02)
lo no wireless extensions.
eth2 IEEE 802.11 Access Point: Not-Associated
Link Quality:5 Signal level:213 Noise level:199
Rx invalid nwid:0 invalid crypt:0 invalid misc:0
eth0 no wireless extensions.
(my internet was working during the above "iwconfig command)