Question: In UTRAN's Iu interface, when using Permanent Virtual Connections (PVCs) for IP packet transport over an ATM network, which LLC encapsulation option is mandated for both O&M and ATM Inverse ARP association methods?
Option 1: Classical IP Encapsulation over AAL2
Option 2: Multiprotocol Encapsulation over AAL5
Option 3: Simple IP Encapsulation over AAL3/4
Option 4: Generic Routing Encapsulation (GRE) over AAL1
Explanation: According to telecom standards for UTRAN's Iu interface, when Permanent Virtual Connections (PVCs) are utilized for transporting IP packets across an ATM transport network, the 'Multiprotocol Encapsulation over AAL5' option is required for LLC encapsulation, applying uniformly to associations via both Operations and Maintenance (O&M) and ATM Inverse ARP methods.