I recently put a new disk image on my SD card to boot a BeagleBone Black, Rev C. The image is : bone-debian-7.11-lxde-4gb-armhf-2016-06-15-4gb.img. No problems with writing the image to disk or booting. However when I try the command 
sudo apt-get update , the following error messages appear,
devo@beaglebone:~$ sudo apt-get update
Err http://repos.rcn-ee.com wheezy Release.gpg
Could not resolve ‘repos.rcn-ee.com’
Err http://httpredir.debian.org wheezy Release.gpg
Could not resolve ‘httpredir.debian.org’
Err http://httpredir.debian.org wheezy-updates Release.gpg
Could not resolve ‘httpredir.debian.org’
Err http://security.debian.org wheezy/updates Release.gpg
Could not resolve ‘security.debian.org’
Reading package lists… Done
W: Failed to fetch http://httpredir.debian.org/debian/dists/wheezy/Release.gpg Could not resolve ‘httpredir.debian.org’
W: Failed to fetch http://httpredir.debian.org/debian/dists/wheezy-updates/Release.gpg Could not resolve ‘httpredir.debian.org’
W: Failed to fetch http://security.debian.org/dists/wheezy/updates/Release.gpg Could not resolve ‘security.debian.org’
W: Failed to fetch http://repos.rcn-ee.com/debian/dists/wheezy/Release.gpg Could not resolve ‘repos.rcn-ee.com’
W: Some index files failed to download. They have been ignored, or old ones used instead.
Drew Fustini suggested I post this here. Thanks Drew