Which Windows Defender firewall rule is a possible cause of the issue?

You are a network administrator at your company.

The company uses an application that checks for network connectivity to a server by sending a ping request to the IPv6 address of the server. If the server replies, the application loads. A user cannot open the application. You manually send the ping request from the computer of the user and the server does not reply. You send the ping request from your computer and the server replies. You need to ensure that the ping request works from the user’s computer.

Which Windows Defender firewall rule is a possible cause of the issue?
A . File and Printer Sharing (NB-Datagram-In)
B . File and Printer Sharing (Echo Request ICMPv6-Out)
C . File and Printer Sharing (NB-Datagram-Out)
D . File and Printer Sharing (Echo Request ICMPv6-In)

Answer: D

Explanation:

References: https://www.howtogeek.com/howto/windows-vista/allow-pings-icmp-echo-request-through-your-windowsvista-firewall/