Final answer:
Port 3306 is commonly associated with MySQL, hence if a port scan reveals it as open, the server is most likely running MySQL.
Step-by-step explanation:
If a port scan of a remote system shows that port 3306 is open, it is most likely that the server is running MySQL. This is because port 3306 is the default port for the MySQL database system. Although it is possible to configure other database systems to use this port, it is commonly associated with MySQL, and therefore, option C. MySQL is the likely answer.
Port 3306 is commonly associated with the MySQL database server. MySQL is a popular open-source relational database management system (RDBMS) widely used for various applications and websites. The default port for MySQL is 3306, and its open status during a port scan suggests that the remote server is likely running a MySQL database service.
It's important to note that while port numbers can provide clues about the services running on a system, they are not definitive proof of the software in use. System administrators can configure services to run on different ports, and multiple services may share the same port on a single server. Nevertheless, the association of port 3306 with MySQL is a common and widely recognized convention in networking and security, making it a reasonable assumption in many cases.