Which are the two limitations of the predefined NAT solution? (Choose two)

Deterministic NAT uses port-block allocation, which is a specific method of port presentation, but it's not the only available option in NAT generally, and this choice is not phrased as a limitation of predefined NAT.

NetFlow and syslog are crucial components for monitoring and auditing in Carrier-Grade NAT (CGN) deployments, including deterministic NAT, so this statement is incorrect.

While changing NAT modes with active translations can be disruptive, this is a general operational consideration for most complex NAT configurations, not a unique limitation specific to the predefined mode itself.

In a predefined or deterministic NAT solution, port blocks are often allocated in a uniform manner to each subscriber to simplify the mapping calculation, which can lead to inefficient port usage if subscriber needs vary widely.

Deterministic NAT relies on fixed, pre-allocated port blocks per subscriber rather than a dynamic global pool. Consequently, a 'global port limit' parameter in the sense of shared pool exhaustion is not a primary operational control point for this mode.