4.1 Data center market segment The data center (DC) is where all the IT systems come together in a robust environment. A single outage in a data center can cause major interruptions to a company, including loss of business. Therefore the data center focuses on reliability and resiliency of systems or services to an end user. With this goal in mind, the DC usually ensures physical and infrastructure resiliency. Typical physical resiliency takes into account things such as physical location to avoid building in a geologically or politically unstable area, fences, and RAM-RAID prevention techniques are usually employed. Further physical security is used to ensure that the DC has controlled access, which might include multiple levels of security and authentication (for example, locked doors and physical guards) before a person can access equipment within the DC. A data center deployment also needs to consider business continuity and disaster recovery planning. This might include connecting to another data center with sufficient data connectivity between the two sites to operate one site as a backup data center. The backup data center in such a case is referred to as a hot or warm backup data center and can take over operations in the case of a catastrophic event to the primary DC. Infrastructure resiliency can address such areas as power, cooling and