n Part $1\mathrm{.}1,$ Step $9,$ you ran nmap against the Security Onion machine at $192\mathrm{.}168\mathrm{.}1\mathrm{.}6.$ What is a description of the protocol that was $"$up$"?$

Question $3$ options:

a$)$

None of these

b$)$

A cryptographic network protocol for operating network services securely over an unsecured network. Typical applications include remote command$-$line, login$,$ and remote command execution.

c$)$

An application protocol used on the Internet or local area network to provide a bidirectional interactive text$-$oriented communication facility using a virtual terminal connection

d$)$

A standard communication protocol used for the transfer of computer files from a server to a client on a computer network.