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You are conducting a port scan on a subnet that has ICMP blocked. You have discovered 23 live systems and after scanning each of them you notice that they all show port 21 in closed state.

What should be the next logical step that should be performed?

A.

Connect to open ports to discover applications.

B.

Perform a ping sweep to identify any additional systems that might be up.

C.

Perform a SYN scan on port 21 to identify any additional systems that might be up.

D.

Rescan every computer to verify the results.

What ICMP message types are used by the ping command?

A.

Timestamp request (13) and timestamp reply (14)

B.

Echo request (8) and Echo reply (0)

C.

Echo request (0) and Echo reply (1)

D.

Ping request (1) and Ping reply (2)

Who is an Ethical Hacker?

A.

A person who hacks for ethical reasons

B.

A person who hacks for an ethical cause

C.

A person who hacks for defensive purposes

D.

A person who hacks for offensive purposes