Case 19-1 Juliet Has Just Become a Network Administrator for a Chain

Case 19-1
Juliet has just become a Network Administrator for a chain of pet stores. Please answer the questions below.
-On her first day on the job, an ISP vendor calls Juliet and asks her which Internet Protocol version she is using for her IP addresses.The IP address is: 204.127.129.1.This is ____.

A) IPv4
B) IPv6
C) NAPv4
D) NAPv6