Which two steps are required for a Kompella Layer 2 VPN？（）

A.CPE VPN’s require dedicated VPN aware hardware at customer site， PPVPN does not.
B.PPVPN’s require dedicated VPN aware hardware at customer site， CPE VPN’s does not.
C.CPE VPN’s scale better than PPVPN’s as they do not require a per site configuration on the CPE
D.PPVPN’s scale better than CPE VPN’s as they do not require a per site configuration on the CPE

A.L2F
B.PPTP
C.Circuit cross-connect
D.Draft-Martini-based VPNs
E.Draft-Kompella-based VPNs

A.hdlc-ccc
B.atm-cell-ccc
C.cisco-hdlc-ccc
D.ethernet-vlan-ccc
E.ethernet-snap-ccc