The Domain Name System (DNS) is an essential part of the Internet on whose function many other protocols rely. One key DNS function is Dynamic Update, which allows hosts on the network to make updates to DNS records dynamically, without the need for restarting the DNS service. Unfortunately, this dynamic process does expose DNS servers to security issues. To address these issues two protocols were introduced: Transaction SIGnature (TSIG) and Domain Name System SECurity extensions (DNSSEC). In Internet Protocol version 4 (IPv4) networks using these protocols eliminated security issues.