What are the four key design requirements for mobile IP backhaul? (Choose four)
A . X2 interface turning point
B . bandwidth
C . Layer 2 Tunneling
D . native IPv6 support
E . DiffServQoS
F . MPLS-enabled interface
G . network timing distribution and recovery
H . mandatory Layer 3 access up to a cell site
Answer: C, D, G, H