A CASB Provides the Application Proxy and Web Application Firewall

Multiple Choice

A CASB provides the application proxy and web application firewall to a large retailer. All access to the retailer cloud application must originate from the CASB-designated IP addresses. The CASB has known geolocations with known IP addresses. Suddenly, all customers are not able to access the retailer cloud applications. Which of the following is MOST likely the reason for the issue?

A) Additional CASB IP addresses were added to the authorized pool
B) All of the CASB's European datacenters are down
C) There was federation and SSO misconfiguration
D) The CASB's SSL/TLS certificate expired