Answer:
Port scanner.
Explanation:
A server can be defined as a specialized computer system that provides specific services for its clients on request. An example is a web server.
A web server is a type of computer that run websites and distribute web pages as they requested over the internet by end users (clients). When an end user request for a website by adding or typing the uniform resource locator (URL) on the address bar of a web browser, a request is sent to the internet to view the corresponding web pages (website) associated with that particular address.
In this scenario, the tool you should use is a port scanner because it would scan all packets that are sent or received by the server i.e all packets that are being transmitted to and from the server.
