Key Terms 9

Question 1

The public circuit-switched telephone network, which is made up of telephone lines, fiber-optic cables, cellular networks, communications satellites, and undersea telephone cables and allows all phone-to-phone communication. It was a fixed-line analog telephone system, but is now almost entirely digital and includes mobile as well as fixed telephones.

Answer 1

Public-switched telephone network (PSTN)

Question 2

The set of protocols, technologies, methodologies, and transmission techniques involved in the delivery of voice data and multimedia sessions over IP-based networks.

Answer 2

Voice over IP (VoIP)

Question 3

The signaling protocol widely used for controlling communication, as in voice and video calls over IPbased networks.

Answer 3

Session Initiation Protocol (SIP)

Question 4

Social engineering activity over the telephone system, most often using features facilitated by VoIP, to gain unauthorized access to sensitive data.

Answer 4

Vishing (voice and phishing)

Question 5

A standard that addresses call signaling and control, multimedia transport and control, and bandwidth control for point-to-point and multipoint conferences.

Answer 5

H.323

Question 6

Used to transmit audio and video over IP-based networks. It is used in conjunction with the RTCP. BLANK transmits the media data, and RTCP is used to monitor transmission statistics and QoS, and aids synchronization of multiple data streams.

Answer 6

Real-time Transport Protocol (RTP)

Question 7

When a specialized program is used to automatically scan a list of telephone numbers to search for computers for the purposes of exploitation and hacking.

Answer 7

War dialing

Question 8

A circuit-switched telephone network system technology designed to allow digital transmission of voice and data over ordinary telephone copper wires.

Answer 8

Integrated Services Digital Network (ISDN)

Question 9

A set of technologies that provide Internet access by transmitting digital data over the wires of a local telephone network. BLANK is used to digitize the “last mile” and provide fast Internet connectivity.

Answer 9

Digital Subscriber Line (DSL)

Question 10

A device that provides bidirectional data communication via radio frequency channels on cable TV infrastructures. BLANK are primarily used to deliver broadband Internet access to homes.

Answer 10

Cable modem