Question: What is the primary purpose of a Closed Subscriber Group in an E-UTRAN and UTRAN?
Option 1: To provide priority access to emergency services for all subscribers.
Option 2: To restrict access to specific cells or cell groups within a PLMN to a defined group of subscribers.
Option 3: To enable roaming between different public land mobile networks (PLMNs) for all subscribers.
Option 4: To allow open access to all cells and cell groups within a PLMN for any subscriber.
Explanation: A Closed Subscriber Group is designed to restrict access to specific cells or cell groups within a Public Land Mobile Network (PLMN) to a defined group of subscribers, identified by a unique Closed Subscriber Group Identity (CSG-ID). This allows network operators to control and manage access to certain areas of the network for specific users.