What is a primary benefit of NAT?

The correct answer is B. A primary benefit of NAT is that it hides internal private IP addresses behind one or more translated public addresses, reducing direct exposure of internal addressing to external networks. Source NAT is commonly used for outbound internet access, while destination NAT can publish internal services through translated addresses. Option A is wrong because NAT is not random identity-hiding for anonymity; it is controlled address translation. Option C is not a proper security or continuity use case; using NAT to bypass source restrictions is not the intended administrative purpose. Option D is misleading because VPNs commonly carry private addresses without requiring public NAT for every resource, and NAT inside VPN design is a separate special case, not the primary NAT benefit. NAT does not replace Access Control. A translated connection still requires appropriate access policy permission. Reference topics: NAT Policy, automatic/manual NAT, address translation, Security Gateway packet handling.