Select the three best answers which best describe Private Network-to Network Interface (PNNI) in
an ATM network (Choose three.)

A.
It is the Routing protocol used between ATM switches

B.
PNNI uses the same Dijsktra algorithm for SPF calculation

C.
PNNI and OSPF use the same Database to make cohesive decision for packet forwarding

D.
PNNI measures line capacities and delays in addition to simple cost metrics

Explanation:
The Private Network-to-Network Interface (PNNI) is a link-state routing protocol used in ATM
networks. PNNI is similar to the open shortest path first (OSPF) used for IP routing.
PNNI is a suite of network protocols that can be used to discover an ATM network topology, create
a database of topology information, and route calls over the discovered topology. PNNI is a linkstate routing protocol, which means that the protocol collects information about the current state of
links and nodes in the network to build a network database. The PNNI network database can be
used to determine the network structure and the current state of network components. To build the
PNNI network database, each PNNI node must receive topology information from all the other
devices in the network. To keep the database current, the node must receive regular updates from
other nodes.