Although its predecessor's header is half as big and is limited to four billion nodes, address translation has slowed its adoption, even though its 128-bit address space allows for 3.4 times ten to the 38 nodes.  
A technique using the 48-bit AGGR allows endpoint addresses to be stored in its header, enabling tunneling via its predecessor.  Created by a team lead by Steve Deering at PARC, convention states that strings of zeros in these addresses can be replaced by a double colon and the last 32 bits can be written in decimal instead of hex.  Although its predecessor's header is half as big and is limited to four billion nodes, address translation has slowed its adoption, even though its 128-bit address space allows for 3.4 times ten to the 38 nodes.  China's Next Generation Internet is abandoning the fourth version of, FTP, what addressing protocol usually paired with TCP that is to replace IPv4?
A technique using the 48-bit AGGR allows endpoint addresses to be stored in its header, enabling tunneling via its predecessor.  
Internet Protocol version 6 (prompt on partial answer or on "IPng")