Khan Academy The Internet Practice Test

Why is it important to encourage countries and their Internet Service Providers to upgrade to IP v6?

If a country's ISPs don't adopt IP v6, they may run out of addresses when too many devices want to use the internet in their country.

Upgrading to IPv6 is driven by the need for many more addresses than IPv4 can provide. As the number of devices—phones, computers, sensors, appliances—connects to the internet, the old address space starts to run out. IPv6 uses a 128‑bit address format, giving an astronomical pool of addresses, which lets almost every device have its own globally reachable address and supports growth without resorting to workarounds like network address translation (NAT). That long-term availability and scalability is the core reason to push countries and ISPs to adopt IPv6.

Discussions about speed or added complexity aren’t the main point. IPv6 was designed to be efficient and to improve auto-configuration and routing in large networks, not to slow things down. It also doesn’t eliminate DNS or DHCP. DNS is still needed to translate names into addresses, and DHCP (including DHCPv6) can be used for address assignment in IPv6 networks, though devices can also auto-configure their addresses. Finally, IPv6 isn’t only for private networks; it’s intended for the public internet as the standard next generation protocol.

So the correct choice highlights the fundamental reason: the vast address space of IPv6 supports current and future internet growth by preventing address exhaustion.

IP v6 reduces network speed and increases complexity.

IP v6 eliminates the need for DNS and DHCP.

IP v6 is only useful for private networks and never for public internet.