Final answer:
The new IP addressing scheme that may increase the number of available IP addresses is IPv6, which provides a vastly larger address space than the current IPv4.
Step-by-step explanation:
The new IP addressing scheme mentioned is IPv6. IPv6 stands for Internet Protocol version 6, which is designed to replace the current version, IPv4. The main reason for this upgrade is that IPv4 supports about 4 billion IP addresses, which are now nearly exhausted due to the explosion of internet-connected devices. IPv6, on the other hand, uses a 128-bit address space, significantly increasing the number of available IP addresses to approximately 340 undecillion addresses. This expansion will accommodate future growth of the internet and the rise of the Internet of Things (IoT), where many everyday objects are network-connected.