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41.John wants to hide his wireless network and protect it from unauthorized access. Which of the following should be used to prevent the network from being accessed in an unauthorized manner?
43.Jack is fooled by a person who introduces himself as new IT staff in his organization. On the person’s request, Jack reveals the web server login details. Later he finds out that the person was a fraud and confidential data has been stolen from the web server. What kind of attack has Jack encountered?