Ann a security technician receives a report from a user that is unable to access an offsite SSN server. Ann
checks the firewall and sees the following rules:
Allow TCP 80
Allow TCP 443
Deny TCP 23
Deny TCP 20
Deny TCP 21
Which of the following is preventing the users from accessing the SSH server?
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A.
Deny TCP 20
B.
Deny TCP 21
C.
Deny TCP 23
D.
Implicit deny