Is it true that the Blue Coat Management Center cannot be used to configure a ProxySG until an IP address has been assigned to it?

The statement is true because the Blue Coat Management Center requires communication with the ProxySG to perform any configuration tasks. Without an assigned IP address, the ProxySG cannot be properly integrated into the network, leading to communication issues between the management center and the proxy device. This IP address serves as the network identifier allowing the Management Center to recognize and connect to the ProxySG. Therefore, configuration cannot proceed until the device is network-ready with an IP address, making the answer correct.

Assigning an IP address is a fundamental step in network configuration, ensuring that devices can interact and be managed effectively. Hence, the dependency on the IP address is crucial before establishing any connections that would facilitate configuration through the Management Center.