NT1210 Un 7 Chapter 7 Rview
Unit 7 Chapter 7
Review Questions, multiple choice, Key terms, Acronyms and Define
1. A
2. A , B
3. B , D
4. A
5. A
6. B , D
7. A
8. C
9. C
10. D
11. C
12. A
13. A , D
14. C
15. B , C
16. B , D
17. C
18. B , D
19. A , C
20. B , C
Key Terms switched circuit- company in reaction to signaling (the user tapping telephone keys or a modem sending in the same digits), with the telco tearing down the circuit when the user is dedicated circuit- An electrical circuit created by a telco on behalf of a customer, with the circuit staying up all the time, dedicated for use by the one customer that ordered the circuit. Also known as a leased line, leased circuit, and point-to-point line. circuit switching- The overall process by which a series of telco devices called circuit switches connect a circuit from one customer device to the other. packet switching- The process of forwarding customer data in a WAN by looking at the header of the messages sent into the WAN by the customer and making a per-message (per-packet) decision as to where to forward each message. leased line- A physical link between two locations, provided by a telco, that allows two-way communication between sites. time-division multiplexing- A type of logic used by some networking devices, including circuit switches in the telco, in which the switch divides a faster-speed line into time channels.
T-carrier system- The name of the combination of different physical line standards.
DS0- Digital Signal Level 0. One of the physical line standards in the T-carrier system, as originally created by the companies of the Bell System in the United States. DS0 runs at 64 Kbps.
DS1- Digital Signal Level 1. One of the physical line standards in the T-carrier system, as originally created by the companies of the Bell System in the U. S.
Frame Relay- A widely popular packet-switching technology and service that emerged in the market in the 1990s, using permanent virtual circuits (PVC) between pairs of routers that can
Review Questions, multiple choice, Key terms, Acronyms and Define
1. A
2. A , B
3. B , D
4. A
5. A
6. B , D
7. A
8. C
9. C
10. D
11. C
12. A
13. A , D
14. C
15. B , C
16. B , D
17. C
18. B , D
19. A , C
20. B , C
Key Terms switched circuit- company in reaction to signaling (the user tapping telephone keys or a modem sending in the same digits), with the telco tearing down the circuit when the user is dedicated circuit- An electrical circuit created by a telco on behalf of a customer, with the circuit staying up all the time, dedicated for use by the one customer that ordered the circuit. Also known as a leased line, leased circuit, and point-to-point line. circuit switching- The overall process by which a series of telco devices called circuit switches connect a circuit from one customer device to the other. packet switching- The process of forwarding customer data in a WAN by looking at the header of the messages sent into the WAN by the customer and making a per-message (per-packet) decision as to where to forward each message. leased line- A physical link between two locations, provided by a telco, that allows two-way communication between sites. time-division multiplexing- A type of logic used by some networking devices, including circuit switches in the telco, in which the switch divides a faster-speed line into time channels.
T-carrier system- The name of the combination of different physical line standards.
DS0- Digital Signal Level 0. One of the physical line standards in the T-carrier system, as originally created by the companies of the Bell System in the United States. DS0 runs at 64 Kbps.
DS1- Digital Signal Level 1. One of the physical line standards in the T-carrier system, as originally created by the companies of the Bell System in the U. S.
Frame Relay- A widely popular packet-switching technology and service that emerged in the market in the 1990s, using permanent virtual circuits (PVC) between pairs of routers that can