Not a happy customer, between this and the talk of Musk buying T-Mobile :(

ULA = Unique Local Address, non routable address scheme in IPv6 for use in local networks

SLAAC = Stateless Address Autoconfiguration, a process in IPv6 that allows a host to assign itself an unique IP by listening to other traffic to determine the network ID and then creating the host ID

ICMP = Internet Control Message Protocol, these a specific messages that allow for higher coordination and control rather that data exchange, like ping or dhcp.

ISP = Internet Service Provider, the company that provides your internet acccess like Comcast, Google Fiber, AT&T, etc.

Hey bot, you missed ULA, ICMP, and SLAAC

Edit; and ISP

Trickiest