Regarding PNNI, what statement is true?

A.
PNNI Routing and PNNI Signaling use the same Virtual Circuit

B.
PNNI needs ILMI in order to discover the Peer Node

C.
PTSEs age; Expired PTSEs need to be flushed or refreshed

D.
The final State of a PNNI Node after database synchronization is ‘Updated’

E.
SSCOP is only needed for UNI signaling and not PNNI signaling; PNNI Signaling does not use SAAL

Explanation:
Using the switch default ATM address, hierarchy configuration, and ILMI address autoconfiguration, PNNI automatically determines the addresses and links in the ATM network.