A Client Access Security Broker is a an important component in an enterprise organisation. A Client Access Security Broker or CASB for short provides: 1. Identify; 2. Protection; 3. Detection capabilities for the organisation on the NIST CSF framework model. How it does this is by inspecting traffic that is being sent to and from the Internet, either just the source and destination or through deeper inspection of the contents of the data being transmitted between source and target.