Question

ipv6 was introduced in the 1990s when it became clear that we would run out of
______ in the near future.
computers
transmission media
protocols
ip addresses

Explanation:

IPv6 was developed as IPv4 (the previous - generation IP protocol) was running out of available IP addresses due to the growth of the Internet. It provides a much larger address space to accommodate more devices on the network.

Answer:

IP addresses