What is the major benefit of using NAT with Port Address Translation?

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network-address

#1

What is the major benefit of using NAT with Port Address Translation?

  1. It allows external hosts access to internal servers.
  2. It allows many internal hosts to share the same public IPv4 address.
  3. It improves network performance for real-time protocols.
  4. It provides a pool of public addresses that can be assigned to internal hosts.

Explanation:
Port Address Translation (PAT) tracks IP flows of internal hosts using port numbers. By using port numbers to track flows, PAT allows many users to share a single public IPv4 address.