In this section of Data Communication and Networking – Telephone and Cable Networks for Data Transmission MCQ (multiple choice) Based Short Questions and Answers,it cover the below lists of topics.All the Multiple Choice Question and Answer (MCQs) have been compiled from the book of Data Communication and Networking by The well known author behrouz forouzan.
- DSL MCQs.
- ADSL technology MCQs.
- SDSL, HDSL, and VDSL are other DSL technologies MCQs.
- An HFC network,DOCSIS MCQs.
- Synchronous Optical Network (SONET),STS multiplexer,Regenerator ,Add/drop multiplexer MCQs.
1. In an HFC network, the downstream data are modulated using the _______ modulation technique.
- PSK
- QAM
- PCM
- ASK
B. QAM
2. In an HFC network, the upstream data are modulated using the _______ modulation technique
- QAM
- QPSK
- PCM
- ASK
B. QPSK
3. The standard for data transmission over an HFC network is called _______
- MCNS
- DOCSIS
- CMTS
- ADSL
B. DOCSIS
4. The original telephone network, which is referred to as the plain old telephone system (POTS), was an ________ system
- digital
- analog
- digital as well as analog
- none of the above
B. analog
5. The modern telephone network is now ________
- digital
- analog
- digital as well as analog
- none of the above
C. digital as well as analog
6. The telephone network is made of ______ major components
- 2
- 3
- 4
- none of the above
B. 3
7. The United States is divided into many _______
- LECs
- LATAs
- IXCs
- none of the above
B. LATAs
8. The carrier that handles intra-LATA services is called a(n) _____
- POP
- IXC
- LEC
- none of the above
C. LEC
9. The carrier that handles inter-LATA services is called a(n) _______
- POP
- IXC
- LEC
- none of the above
B. IXC
10. In ______signaling, the same circuit is used for both signaling and data.
- in-band
- out-of-band
- mixed
- none of the above
A. in-band
11. In ________signaling, a portion of the bandwidth is used for signaling and another portion for data.
- in-band
- out-of-band
- mixed
- none of the above
B. out-of-band
12. The protocol that is used for signaling in the telephone network is called ______
- POP
- SSS
- SS7
- none of the above
C. SS7
13. Telephone companies provide two types of analog services: analog _______ services and analog _____services
- switched; in-band
- out-of-band; in-band
- switched; leased
- leased; out-of-band
C. switched; leased
14. The two most common digital services are ________ service and ______
- switched/56; switched/64
- switched/56; DDS
- DDS; swiched 64
- leased; out-of-band
B. switched/56; DDS
15. The term modem is a composite word that refers to the two functional entities that make up the device: a signal _______ and a signal _______
- modulator; demodulator
- demodulator; modulator
- modern; demo
- none of the above
A. modulator; demodulator
16. Most popular modems available are based on the ________standards
- V-series
- X-series
- VX-series
- none of the above
A. V-series
17. ______technology is a set of technologies develpoed by the telephone companies to provide high data rate transmission
- ASL
- DSL
- LDS
- none of the above
B. DSL
18. The traditional cable TV system used ________cable end to end
- twisted-pair
- coaxial
- fiber-optic
- none of the above
B. coaxial
19. The second generation of cable networks is called a(n) _________ network
- HFC
- HCF
- CFH
- none of the above
A. HFC
20. The HFC network uses _______ cable
- twisted-pair
- coaxial
- fiber-optic
- a combination of (b) and (c)
D. a combination of (b) and (c)
21. A local telephone network is an example of a _______ network.
- packet-switched
- circuit-switched
- message-switched
- none of the above
B. circuit-switched
22. The local loop has _______ cable that connects the subscriber telephone to the nearest end office.
- twisted-pair
- coaxial
- fiber-optic
- none of the above
A. twisted-pair
23. Data from a computer are _______; the local loop handles _______ signals.
- analog; analog
- analog; digital
- digital; digital
- digital; analog
D. digital; analog
24. _______ is suitable for businesses that require comparable upstream and downstream data rates.
- VDSL
- ADSL
- SDSL
- (a) and (b)
C. SDSL
25. DMT is a modulation technique that combines elements of _______ and _______.
- FDM; TDM
- QDM; QAM
- FDM; QAM
- PSK; FSK
C. FDM; QAM
26. The largest portion of the bandwidth for ADSL carries _______.
- voice communication
- upstream data
- downstream data
- control data
C. downstream data
27. _______ was designed as an alternative to the T-1 line.
- VDSL
- ADSL
- SDSL
- HDSL
D. HDSL
28. HDSL encodes data using _______.
- 4B/5B
- 2B1Q
- 1B2Q
- 6B/8T
B. 2B1Q
29. Another name for the cable TV office is the _______.
- splitter
- fiber node
- combiner
- head end
D. head end
30. A traditional cable TV network transmits signals ______.
- upstream
- downstream
- upstream and downstream
- none of the above
B. downstream