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

Question

Options

• AIt is the Routing protocol used between ATM switches
• BPNNI uses the same Dijsktra algorithm for SPF calculation
• CPNNI and OSPF use the same Database to make cohesive decision for packet forwarding
• DPNNI measures line capacities and delays in addition to simple cost metrics

• A
  72% (21)
• C
  28% (8)

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 link- state 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.

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