When responding to an issue, it is very easy to get tunnel vision and focus on one possibility. It is important to consider all possibilities while working towards a solution. Constant reporting of various cyber-attacks happening every day around the world can draw people into the mindset of every issue being caused by a cyber-attack. Luckily in this instance, even though Telstra initially misidentified the issue as a DDoS attack, their quick remediation and proper identification of the problem show that they focused efforts efficiently and did not fall into the trap of getting tunnel vision. From the initial report of the outage by Telstra to the return of full service and the identification of the DNS issue, less than four hours had elapsed. More information on this incident can be found at: https://www.theguardian.com/technology/2020/aug/02/hackers-cause-telstra-outages-in-australias-eastern-states-with-malicious-cyber-attack