How can telnet be used to fingerprint a web server?

How can telnet be used to fingerprint a web server?

How can telnet be used to fingerprint a web server?

A.
telnet webserverAddress 80
HEAD / HTTP/1.0

B.
telnet webserverAddress 80
PUT / HTTP/1.0

C.
telnet webserverAddress 80
HEAD / HTTP/2.0

D.
telnet webserverAddress 80
PUT / HTTP/2.0

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RoundHatHacker

RoundHatHacker

ok but why not C ?

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mnmnc

mnmnc

because http 2.0 is not text based.

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