Monitoring & DevOps Glossary

An email authentication method that uses cryptographic signatures to verify message integrity.

An email authentication protocol that protects against phishing and spoofing.

Domain Name System - translates human-readable domain names to IP addresses.

99.999% availability - approximately 5 minutes of downtime per year.

A high-performance, open-source remote procedure call framework by Google.

Three-digit codes returned by servers indicating the result of an HTTP request.

The time delay between a request and the beginning of a response.

Mean Time To Detect - the average time to identify that an issue has occurred.

Mean Time To Repair/Recovery - the average time to restore service after a failure.

A network utility that tests connectivity by sending ICMP echo requests.

A Service Level Agreement defining the expected level of service between a provider and customer.

An email authentication method that specifies which servers can send email for a domain.

A digital certificate that authenticates website identity and enables encrypted connections.

The percentage of time a system is operational and accessible.

A protocol providing full-duplex communication channels over a single TCP connection.