Datacentres will typically offer redundant mains power, Uninterruptible Power Supplies, diesel backup generators, redundant Internet connections from multiple ISPs, strong physical security (CCTV, fences, alarms, security guards, biometric entry systems, etc.) and sophisticated anti-fire systems. Combined with far high Internet connection speeds than can be obtained in a normal office, this makes datacentre colocation ideal for high availability, business critical services and/or solutions serving a large user volume.