* A warm site is a backup data center that has some network equipment and connectivity, but not enough to handle the full load of the primary site. It requires some time and effort to activate and configure in the event of a disaster12.
* An active-active site is a backup data center that is fully operational and synchronized with the primary site, and can take over the load immediately if the primary site fails. It is the most expensive and complex option12.
* A cold site is a backup data center that has no network equipment or connectivity, and only provides physical space and power. It requires a lot of time and resources to set up and activate in the event of a disaster. It is the cheapest and simplest option12.
* A cloud site is a backup data center that is hosted by a third-party provider, and can offer various levels of availability and scalability depending on the service level agreement. It can be a cost-effective and flexible option, but also introduces some challenges such as security, compliance, and vendor lock-in13.
References:
* 1: CompTIA Network+ N10-008 Study Guide, Chapter 6: Network Resiliency and Availability, Section:
Disaster Recovery
* 2: Professor Messer's CompTIA N10-008 Network+ Course Notes, Page 54: Disaster Recovery Sites
* 3: Backup Strategy: Ultimate Guide for Data Backup