Question: What is a key design objective for the Iu interface in UTRAN, regarding its relationship with Core Network Access Points and manufacturers?
Option 1: To mandate a single manufacturer for all RNCs and Core Network elements within a PLMN.
Option 2: To restrict interconnection to only those Core Network Access Points within the same PLMN.
Option 3: To enable interconnection of RNCs with Core Network Access Points irrespective of the manufacturer, supporting all UMTS services across multiple PLMNs if shared.
Option 4: To require a dedicated transport technology for each of Iu-PS and Iu-BC, preventing sharing.
Explanation: This option aligns with the objective of ensuring interoperability and flexibility in the network architecture. By allowing RNCs to interconnect with Core Network Access Points regardless of the manufacturer, the Iu interface supports a multi-vendor environment, facilitating network sharing across different Public Land Mobile Networks (PLMNs) while enabling all UMTS services.