Two techniques used to provide access to a network from another network are

• A. NAT primarily addresses routing efficiency
• B. NAT is used to translate domain names to IP addresses
• C. NAT is used to encrypt internal traffic
• D. NAT and IP masquerading are two techniques used to provide access to a network from another network

Answer: (D)

The idea being tested is how networks enable access across different networks using address handling. NAT translates internal private IP addresses to a public IP when traffic leaves the private network, allowing those hosts to reach external networks while conserving public addresses. IP masquerading is a specific form of NAT that hides internal hosts behind the gateway’s external IP, so many devices appear as a single source to the outside world. Together, NAT and IP masquerading provide a practical way for one network to access another network by enabling outbound connectivity and controlling how responses come back.

NAT’s main purpose isn’t routing efficiency, and NAT translates IPs rather than domain names (that’s DNS). NAT also doesn’t provide encryption by itself; encryption is handled by other technologies like VPNs or TLS.