Which backup site requires frequent testing to insure smooth switch over during emergency?
There are three types of backup sites, hot, warm and cold.
A Hot site has all the capability of the main site, with all the
hardware necessary. It requires no testing because the data is
copied over in real time so that the information is redundant.
A Warm site has some of the equipment installed, and may need to
have work done in an emergency.
A Cold site may have some of the equipment, but in a powered
down state.
You should test all types, but the warm and cold types would
need more frequent testing, with cold needing the most.