ubuntu@ubuntu:~$ apt-cache policy bcmwl-kernel-source 
bcmwl-kernel-source:
  Installed: (none)
  Candidate: 6.30.223.248+bdcom-0ubuntu0.1
  Version table:
     6.30.223.248+bdcom-0ubuntu0.1 0
        500 cdrom://Ubuntu 14.04.3 LTS _Trusty Tahr_ - Beta amd64 (20150803)/ trusty/restricted amd64 Packages
     6.30.223.141+bdcom-0ubuntu2 0
        500 http://archive.ubuntu.com/ubuntu/ trusty/restricted amd64 Packages