Need help connecting to Internet/WiFi on Ubuntu 14.04 [Dell Latitude 131L]

Question

I downloaded Ubuntu 14.04 today, and I went about installing it on my personal laptop. During the installation it asks you if you would like to apply updates while the installation is being processed; however, my laptop was already having issues connecting at the time, so I could not select that option. (I do not know if that has any effect on the issue I am currently experiencing.)

Ubuntu just finished installing, and it automatically has no connections. I plugged in an ethernet cord to the laptop, and I still couldn't get any sort of connections.

Any help would be greatly appreciated.

Note: Before installing Ubuntu, I was running Windows 7. I was, also, connected to WiFi earlier today, before installing Ubuntu.

Solution

NIC Solution for Dell Latitude E4200 Running Ubuntu 14.04.3

In short:

1. Apply updates
2. Go to System Settings
3. Software Updates
4. Select "Additional Drivers"
5. Select "Using Broadcom 801.11 Linux..." Under Broadcom Corp Wireless 1397..
6. Reboot

and Voilà: it works!