Which are the two characteristics of 4G/LTE networks?
A. eNodeBs in the cell towers require less built-in intelligence
B. eNodeB uplinks to the packet core use the lub interfaces
C. The E-UTRAN model forms the basis of 4G/LTE RAN topologies
D. RNCs in 4G/LTE networks have built-in MPLS support
E. 4G/LTE networks use centralized MTSO-based handoff between cell towers
F. Using the X2 interface,eNodeBs have direct communication between each other
