Custom DNS records used when an application needs the location of a specific service are called

Custom DNS records used when an application needs the location of a specific service are called

• A. SRV Records
• B. A Records
• C. PTR Records
• D. AAAA Records

Answer: (A)

DNS SRV records are designed for locating a specific service, including the exact host and port the service runs on. They let an application discover where to connect without hard‑coding IP addresses. An SRV record specifies the service name and protocol (for example, a service like LDAP over TCP), the priority and weight for selecting among multiple servers, the port number, and the target host that provides the service. This setup supports load balancing and failover, so clients can dynamically find the best available server for the requested service. In contrast, A records simply map a domain to an IPv4 address, and AAAA records map to an IPv6 address—these tell you where a domain lives, not what service it provides or where to connect to use that service. PTR records are used for reverse DNS lookups, translating an IP address back to a domain name. So for the need of locating a specific service and its port, SRV records are the appropriate choice.

DNS SRV records are designed for locating a specific service, including the exact host and port the service runs on. They let an application discover where to connect without hard‑coding IP addresses. An SRV record specifies the service name and protocol (for example, a service like LDAP over TCP), the priority and weight for selecting among multiple servers, the port number, and the target host that provides the service. This setup supports load balancing and failover, so clients can dynamically find the best available server for the requested service.

In contrast, A records simply map a domain to an IPv4 address, and AAAA records map to an IPv6 address—these tell you where a domain lives, not what service it provides or where to connect to use that service. PTR records are used for reverse DNS lookups, translating an IP address back to a domain name. So for the need of locating a specific service and its port, SRV records are the appropriate choice.