A technician receives a report that two users are having difficulty retaining connections to a server hosting a company application. On testing, the technician sees the following:
Initial connections to the server are sporadic.
If connected, the client is dropped within 30 seconds.
Attempting to reconnect is sometimes successful but other times requires multiple attempts.
Local testing on the server reveals no problems.
Given these symptoms, which of the following is the MOST likely cause of the problem?