These are the results I'm getting:

root@kali:~# apt-get update Err http://security.kali.org sana/updates InRelease

Err http://http.kali.org sana InRelease

Err http://http.kali.org sana-proposed-updates InRelease

Err http://security.kali.org sana/updates Release.gpg
Could not resolve 'archive-4.kali.org' Err http://http.kali.org sana Release.gpg
Could not resolve 'archive-4.kali.org' Err http://http.kali.org sana-proposed-updates Release.gpg Could not resolve 'archive-4.kali.org' Reading package lists... Done W: Failed to fetch http://http.kali.org/kali/dists/sana/InRelease

W: Failed to fetch http://security.kali.org/kali-security/dists/sana/updates/InRelease

W: Failed to fetch http://http.kali.org/kali/dists/sana-proposed-updates/InRelease

W: Failed to fetch http://security.kali.org/kali-security/dists/sana/updates/Release.gpg Could not resolve 'archive-4.kali.org'

W: Failed to fetch http://http.kali.org/kali/dists/sana/Release.gpg Could not resolve 'archive-4.kali.org'

W: Failed to fetch http://http.kali.org/kali/dists/sana-proposed-updates/Release.gpg Could not resolve 'archive-4.kali.org'

W: Some index files failed to download. They have been ignored, or old ones used instead.