Infrastructure Public cloud services Private cloud solutions DNS, CDNs, reverse proxies IaC, cloud automation and orchestration Virtualization and containerization Pre-packaged application catalogs Data serialization systems Communication protocols Databases and caching systems Big data analytics, search engines, logging and observability Distributed file systems Load balancers, reverse proxies, service routing TLS/SSL certificate authorities Event-driven systems Message brokers (aka. message queues) Visibility (Observability and Monitoring) Service communication protocols Service mesh and service discovery Task queues (aka. job queues) Web/HTTP servers Infrastructure testing