Datacenter 101 provides an overview of key concepts related to data centers including: 1) Data centers are facilities used to house large amounts of electronic equipment like computers and communication hardware. 2) Reasons for data center consolidation include safety during disasters and efficient data storage and hardware virtualization. 3) Physical infrastructure of data centers includes thick walls, HVAC, racks, UPS/generators, and security cameras. Network infrastructure consists of routers, switches, firewalls, peering, bandwidth, and carrier services.