---
esco_uri: http://data.europa.eu/esco/skill/071233c4-ad2b-4f50-b79f-768d2231163e
esco_label: "domain name service"
relation: essential
onet_soc: 15-1242.00
source: model-knowledge
confidence: high
qa_count: 0
generator: gemma3:27b (prompt-designed and spot-checked by Claude)
generated: 2026-07-10
---

# domain name service — Database Administrator

As a Database Administrator, understanding DNS isn't about *managing* the global DNS system – it’s about ensuring your databases can reliably resolve hostnames used in configuration, replication, connection strings, and data access layers. Daily tasks often involve verifying that forward and reverse DNS lookups work correctly for database servers (e.g., confirming `dbserver1.example.com` resolves to the correct IP address *and* vice versa). Incorrect DNS resolution is a frequent cause of connectivity issues; replication failing because nodes can't find each other, applications unable to connect, or security features like host-based authentication breaking down. You’ll be troubleshooting these connection problems frequently.

Specifically, you'll use tools like `nslookup`, `dig`, and `ping` (often from the database server itself) to diagnose DNS issues.  You might also work with network teams to validate DNS records related to your database infrastructure – ensuring A, CNAME, and PTR records are accurate.  A key pitfall is assuming DNS is 'just working' when it isn’t; a seemingly intermittent connection issue often traces back to DNS propagation delays or misconfigured records. You need to be able to quickly isolate if the problem lies within your database server's configuration (e.g., `/etc/resolv.conf`) or externally.

A 'good' DBA proactively monitors DNS resolution for critical database servers, potentially using scripting or monitoring tools to automatically check hostname-to-IP mapping. They understand how DNS impacts high availability setups – ensuring failover mechanisms rely on correctly configured DNS records.  They also collaborate with security teams to ensure DNSSEC is appropriately implemented where applicable, protecting against DNS spoofing attacks that could compromise database access.

Finally, consider data integration scenarios. If your databases pull data from external sources identified by hostnames, reliable DNS resolution is *critical* for those integrations to function correctly.  This extends beyond just the database server itself; any application tier accessing the database also relies on proper DNS configuration.

## Weitere Anreicherung

Stage-2 source for future practitioner grounding: arXiv cs.SE (software-engineering preprints).
