Practice Exam Test Questions
Choose the letter of the best answer in each questions.
1. To use a cable network for data transmission, we need two key devices: a ________ and a _________.
A) CT; CMTS
B) CM; CMTS
C) CM; CMS
D) none of the above
Answer: Option B
Solution:
2. A local telephone network is an example of a _______ network.
B) message-switched
C) circuit-switched
D) none of the above
Answer: Option C
Solution:
3. A traditional cable TV network transmits signals ______.
A) downstream
B) upstream
C) upstream and downstream
D) none of the above
Answer: Option A
Solution:
4. The traditional cable TV system used ________cable end to end.
A) twisted-pair
B) fiber-optic
C) coaxial
D) none of the above
Answer: Option C
Solution:
5. The telephone network is made of ______ major components.
A) 4
B) 3
C) 2
D) none of the above
Answer: Option B
Solution:
6. Data from a computer are _______; the local loop handles _______ signals.
A) analog; analog
B) digital; digital
C) digital; analog
D) analog; digital
Answer: Option C
Solution:
7. The original telephone network, which is referred to as the plain old telephone system (POTS), was an ________ system.
A) analog
B) digital
C) digital as well as analog
D) none of the above
Answer: Option A
Solution:
8. The protocol that is used for signaling in the telephone network is called ______.
A) SSS
B) SS7
C) POP
D) none of the above
Answer: Option B
Solution:
9. _______technology is a set of technologies developed by the telephone companies to provide high data rate transmission.
A) LDS
B) ASL
C) DSL
D) none of the above
Answer: Option C
Solution:
10. The local loop has _______ cable that connects the subscriber telephone to the nearest end office.
A) fiber-optic
B) coaxial
C) twisted-pair
D) none of the above
Answer: Option C
Solution:
11. The second generation of cable networks is called a(n) _________ network.
A) HCF
B) HFC
C) CFH
D) none of the above
Answer: Option B
Solution:
12. The largest portion of the bandwidth for ADSL carries _______.
A) upstream data
B) downstream data
C) control data
D) voice communication
Answer: Option B
Solution:
13. _______ is suitable for businesses that require comparable upstream and downstream data rates.
A) SDSL
B) ADSL
C) VDSL
D) (b) and (c)
Answer: Option A
Solution:
14. The carrier that handles intra-LATA services is called a(n) _____ .
A) IXC
B) LEC
C) POP
D) none of the above
Answer: Option B
Solution:
15. DMT is a modulation technique that combines elements of _______ and _______.
A) FDM; QAM
B) FDM; TDM
C) PSK; FSK
D) QDM; QAM
Answer: Option A
Solution:
16. The carrier that handles inter-LATA services is called a(n) _______.
A) IXC
B) LEC
C) POP
D) none of the above
Answer: Option A
Solution:
17. The modern telephone network is now ________.
A) digital
B) digital as well as analog
C) analog
D) none of the above
Answer: Option B
Solution:
18. In an HFC network, the upstream data are modulated using the _______ modulation technique.
A) ASK
B) PCM
C) QAM
D) QPSK
Answer: Option D
Solution:
19. _______ was designed as an alternative to the T-1 line.
A) ADSL
B) HDSL
C) VDSL
D) SDSL
Answer: Option B
Solution:
20. HDSL encodes data using _______.
A) 2B1Q
B) 1B2Q
C) 4B/5B
D) 6B/8T
Answer: Option A
Solution:
21. In an HFC network, the downstream data are modulated using the _______ modulation technique.
A) PCM
B) QAM
C) PSK
D) ASK
Answer: Option B
Solution:
22. Another name for the cable TV office is the _______.
A) head end
B) combiner
C) fiber node
D) splitter
Answer: Option A
Solution:
23. The term modem is a composite word that refers to the two functional entities that make up the device: a signal _______ and a signal _______.
A) demodulator; modulator
B) modulator; demodulator
C) modern; demo
D) none of the above
Answer: Option B
Solution:
24. The two most common digital services are ________ service and ______.
A) switched/56; DDS
B) switched/56; switched/64
C) DDS; switched 64
D) leased; out-of-band
Answer: Option A
Solution:
25. The United States is divided into many _______.
A) IXCs
B) LECs
C) LATAs
D) none of the above
Answer: Option C
Solution:
26. The standard for data transmission over an HFC network is called _______.
A) ADSL
B) CMTS
C) DOCSIS
D) MCNS
Answer: Option C
Solution:
27. In ________signaling, a portion of the bandwidth is used for signaling and another portion for data.
A) mixed
B) in-band
C) out-of-band
D) none of the above
Answer: Option C
Solution:
28. Telephone companies provide two types of analog services: analog _______ services and analog _____services.
A) leased; out-of-band
B) out-of-band; in-band
C) switched; in-band
D) switched; leased
Answer: Option D
Solution:
29. The HFC network uses _______ cable.
A) coaxial
B) twisted-pair
C) fiber-optic
D) a combination of (a) and (c)
Answer: Option D
Solution:
30. In ______signaling, the same circuit is used for both signaling and data.
A) mixed
B) out-of-band
C) in-band
D) none of the above
Answer: Option C
Solution:
31. Most popular modems available are based on the ________standards.
A) X-series
B) V-series
C) VX-series
D) none of the above
Answer: Option B
Solution:
Complete List of Chapter Quiz in Data Communications and Networking
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MCQ in Telephone and Cable Networks for Data Transmission (pdf)
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