What is one of the troubleshooting steps for DNSSEC?

One of the key troubleshooting steps for DNSSEC (Domain Name System Security Extensions) is to check if Cloud DNS has DNSSEC enabled. DNSSEC enhances the security of the DNS infrastructure by adding a layer of verification to DNS responses. If DNSSEC is not enabled on your Cloud DNS, the DNS queries will not be protected against attacks such as cache poisoning. Therefore, confirming that DNSSEC is correctly enabled is a crucial step in troubleshooting issues related to DNS resolution and security. Enabling DNSSEC ensures that the data received in response to DNS queries originates from a legitimate source and has not been altered, which is essential for maintaining the integrity and trustworthiness of the domain's DNS records.

Other options, while relevant to general DNS troubleshooting, do not specifically address the security and reliability aspects that DNSSEC is designed to handle. For example, checking the TTL (Time to Live) is important for caching behavior but does not directly relate to the security enhancements that DNSSEC provides.