Exam MS-740 topic 1 question 3 discussion

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A user works from a remote location and has a LAN connection and a mobile internet connection. Each connection is provided by a different internet service provider.
The user can make and receive calls by using the LAN connection. The user cannot make or receive calls by using the mobile connection.
You need to determine the cause of the issue.
Solution: Confirm whether the user can communicate with external users.
Does the solution meet the goal?