CREST Practitioner Security Analyst (CPSA) Practice

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What does an A/AAAA Record represent in DNS?

A type of security certificate
An IP address for domain resolution
A record for email routing
A method for revoking domain ownership

The correct answer is: An IP address for domain resolution

The A/AAAA Record in the Domain Name System (DNS) is primarily used to map domain names to IP addresses. When you access a website, your device needs to find the corresponding IP address to connect to it, and that's where the A (Address) and AAAA (IPv6 Address) records come into play. An A record points to a specific IP address that uses the IPv4 format, which is the traditional IP address format consisting of four groups of numbers. Conversely, the AAAA record is used for IPv6 addresses, which are longer and allow for a greater number of unique IP addresses to accommodate the expanding number of devices online. Both records are essential for the domain resolution process, ensuring that users can reach websites by typing in domain names instead of numerical IP addresses. This function is crucial for the seamless operation of the internet, enabling the user-friendly experience we expect when navigating online.