Which of the following lines in the sshd configuration file should, if present, be changed in order to increase the security of the server?

Which of the following lines in the sshd configuration file should, if present, be changed in
order to increase the security of the server? (Choose TWO correct answers.)

A.
Protocol 2,1

B.
IgnoreRhosts yes

C.
PermitRootLogin yes

D.
PermitEmptyPasswords no

E.
Port 22