https://www.verisign.com/en_us/internet-technology-news/verisign-press-releases/articles/index.xhtml?artlink=ahr0cdovl3zlcmlzawdulm13bmv3c3jvb20uy29tl2fydgljbguvcnnzp2lkptiwmtiwnti=https://technet.microsoft.com/en-us/library/cc770432.aspxhttp://security-musings.blogspot.com/2013/03/building-secure-dns-infrastructure.htmlhttp://tldp.org/howto/dns-howto-6.htmlhttps://en.wikipedia.org/wiki/domain_name_systemhttps://en.wikipedia.org/wiki/dns_spoofinghttp://www.esecurityplanet.com/network-security/how-to-prevent-dns-attacks.htmlhttp://www.firewall.cx/networking-topics/protocols/domain-name-system-dns/161-protocols-dns-response.htmlhttp://www.thegeekstuff.com/2012/05/ettercap-tutorial/https://isc.sans.edu/forums/diary/new+tricks+that+may+bring+dns+spoofing+back+or+why+you+should+enable+dnssec+even+if+it+is+a+pain+to+do/16859/https://support.google.com/a/answer/48090?hl=enhttp://www.ecsl.cs.sunysb.edu/tr/tr187.pdfhttps://tools.ietf.org/html/rfc882https://tools.ietf.org/html/rfc883https://tools.ietf.org/html/rfc1034https://tools.ietf.org/html/rfc1035#bind