What is NAT and why is it used in IPv4 networks?

What is NAT and why is it used in IPv4 networks?

• A. NAT translates private IP addresses to public addresses to conserve IPv4 space and provide a layer of address translation
• B. NAT improves wireless range
• C. NAT assigns private IP addresses from DHCP
• D. NAT encrypts traffic for security

Answer: (A)

NAT stands for Network Address Translation. In IPv4 networks, address space is limited, so NAT lets many devices use private IP addresses inside a local network and maps their traffic to public IP addresses when they reach the Internet. The NAT device tracks each connection and translates the private IP and port to a public IP and port, enabling multiple internal hosts to share a single public address (or a small set of them). This helps conserve IPv4 space and creates a boundary between internal and external addresses. NAT does not improve wireless range, it doesn’t assign private addresses via DHCP (that’s a DHCP function), and it doesn’t encrypt traffic—encryption is handled by other mechanisms.

NAT stands for Network Address Translation. In IPv4 networks, address space is limited, so NAT lets many devices use private IP addresses inside a local network and maps their traffic to public IP addresses when they reach the Internet. The NAT device tracks each connection and translates the private IP and port to a public IP and port, enabling multiple internal hosts to share a single public address (or a small set of them). This helps conserve IPv4 space and creates a boundary between internal and external addresses. NAT does not improve wireless range, it doesn’t assign private addresses via DHCP (that’s a DHCP function), and it doesn’t encrypt traffic—encryption is handled by other mechanisms.