Docker is generally configured to use TCP port . . . . . . . . while managing encrypted traffic.

The correct answer is: C. 2375

Docker is generally configured to use TCP port 2375 while managing encrypted traffic. This is the default port for the Docker daemon, which is responsible for managing containers. The Docker daemon listens on this port for connections from clients, which can be used to create, start, stop, and manage containers.

Option A: 3306 is the default port for the MySQL database server.
Option B: 53378 is the default port for the DNS server.
Option D: 2376 is an alternative port that can be used for the Docker daemon.