A network administrator is organizing corporate DNS infrastructure records to ensure proper service resolution and security compliance. Match each DNS resource record type on the left with its correct functional description on the right.
- SRV RecordDefines the hostname and specific port number used by network services such as SIP or LDAP.
- PTR RecordMaps an IP address to a canonical domain name for reverse DNS resolution queries.
- CNAME RecordCreates an alias mapping one domain name to another existing canonical domain name.
- TXT RecordStores descriptive text data used for domain ownership validation and email authentication rules like SPF and DKIM.
Answer
SRV Record matches the definition of host and port location for services; PTR Record matches reverse DNS resolution from IP to domain; CNAME Record matches domain aliasing to another domain; TXT Record matches storing arbitrary text strings for email authentication like SPF and DKIM.
Each DNS record type has a dedicated function: SRV locates service protocols and port numbers; PTR enables reverse resolution of IP addresses to hostnames; CNAME acts as a domain alias pointing to another hostname; and TXT stores text metadata such as SPF and DKIM authentication signatures.
Step-by-Step Solution
Key Concept
DNS Resource Record Functions and Applications