Many people get the terms computer cabinet and computer rack confused, as they seem to think that they are talking about two completely different items. In certain instances, you could be talking about two different products, but in reality if you are working in the IT field and putting together a new server system, the two terms are for the most part interchangeable, with one major execution
Most Computer Cabinets Are at Least Partially Enclosed
The one main difference you will find between a computer cabinet and a computer rack is that the term cabinet is often used to denote a rack has fully side panels and doors on the front that may or may not be lockable. Depending on the servers you are using and your need for security, these might make a better choice, but you do need to be very aware of being able to provide plenty of cooling air to your servers.