A Mobile Subscriber Is Experiencing Random Limited-Service Outages

Multiple Choice

A mobile subscriber is experiencing random limited-service outages. Customers report being unable to make calls or browse. The service provider management console is not showing any alarms, errors, or critical logs, but does show a large number of connection request failures. Which of the following could be the problem?

A) Misconfigured federation
B) IP address limitations
C) SSO failure
D) Unavailable directory service