Terms: D
- Dead man's switchDead man's switch is a control that alerts when an expected signal stops arriving.
- Dead-letter queueDead-letter queue is a holding place for alert deliveries that exhausted retries.
- Degraded performanceDegraded performance is a state where a service works partially or slowly but is not fully down.
- Discord alertDiscord alert is an alert delivered into a Discord channel via webhook integration.
- DNSDNS is the system that resolves human hostnames into addresses machines use.
- DNS recordDNS record is a typed piece of DNS data such as A, AAAA, CNAME, or TXT.
- DNS resolutionDNS resolution is the process of looking up records for a hostname.
- Domain verificationDomain verification is proving control of a domain, often via DNS or HTTP challenges.
- DowntimeDowntime is the time a service was unavailable during a period.