Question

question 15
which of the following best describes telnet?
an online tool that is used to obtain server and web server information.
the tool of choice for banner grabbing that operates on port 23.
a linux tool that analyzes network traffic and returns information about operating systems.
a tool that connects to an open tcp port and returns anything sent in a five - second period.

Explanation:

Telnet is a network protocol/tool that historically operates on TCP port 23, and it is commonly used for banner grabbing (retrieving service identification data from a remote server). The other options describe different tools: the first refers to tools like WHOIS or server info checkers, the third describes tools like Nmap with OS detection, and the fourth describes a basic port listener or simple banner grabber that is not specific to Telnet's core function.

Answer:

The tool of choice for banner grabbing that operates on port 23.