Question:

(Choose all that apply.) Which of the following command-line entries will successfully perform a banner grab when assuming you have the correct tools installed in the case that you want to perform banner grabbing against a machine (168.15.22.4) you suspect as being a web server?

A Telnet 168.15.22.4 80

explanation

Telnet and netcat, among others, can be used to capture banners. The port number should come last in both cases.