Man-in-the-middle attacks are a real threat to what type of communication?

Which of the following threats is not addressed by digital signature and token technologies?

Which one of the following is concerned with masking the frequency, length, and origin-destination
patterns of the communications between protocol entities?

Which of the following would NOT be considered a Denial of Service Attack?

The connection using fiber optics from a phone company’s branch office to local customers is which
of the following?

Which step ensures the confidentiality of a facsimile transmission?

Which one of the following could a company implement to help reduce PBX fraud?

Phreakers are hackers who specialize in telephone fraud. What type of telephone fraud manipulates
the line voltage to receive a toll-free call?

Which one of the following devices might be used to commit telecommunications fraud using the
“shoulder surfing” technique?

What technique is used to prevent eavesdropping of digital cellular telephone conversations?