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CompTIA Network+ N10-004 Exam Cram

Mike Harwood

Chapter 6

WAN Technologies and Internet Access - all with Video Answers

Educators

Chapter Questions

Problem 1

Your company currently uses a standard PSTN communication link to transfer files between LANs. Until now, the transfer speeds have been sufficient for the amount of data that needs to be transferred. Recently, a new application was purchased that requires a minimum transmission speed of $1.5 \mathrm{Mbps}$. You have been given the task of finding the most cost-effective solution to accommodate the new application. Which of the following technologies would you use?
A. T3
B. $X .25$
C. $T 1$
D. BRI ISDN

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Problem 2

Which of the following best describes the process of creating a dedicated circuit between two communication endpoints and directing traffic between those two points?
A. Multiplexing
B. Directional addressing
C. Addressing
D. Circuit switching

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Problem 3

Which of the following statements are true of ISDN? (Choose the two best answers.)
A. BRI ISDN uses two $B+1 D$ channels.
B. BRI ISDN uses $23 \mathrm{~B}+1$ D channels.
C. PRI ISDN uses two $B+1 D$ channels.
D. PRI ISDN uses $23 \mathrm{~B}+1$ D channels.

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Problem 4

You have been hired to establish a WAN connection between two offices-one in Vancouver and one in Seattle. The transmission speed can be no less than 2Mbps. Which of the following technologies could you choose?
A. $\mathrm{T} 1$
B. PSTN
C. $T 3$
D. ISDN

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Problem 5

On an ISDN connection, what is the purpose of the D channel?
A. It carries the data signals.
B. It carries signaling information.
C. It allows multiple channels to be combined, to provide greater bandwidth.
D. It provides a temporary overflow capacity for the other channels.

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Problem 6

Which of the following circuit-switching strategies does ATM use? (Choose the two best answers.)
A. SVC
B. VCD
C. PVC
D. PCV

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Problem 7

Due to recent cutbacks, your boss approaches you, demanding an alternative to the company's costly dedicated T1 line. Only small amounts of data will require transfer over the line. Which of the following are you likely to recommend?
A. ISDN
B. FDDI
C. The PSTN
D. $\mathrm{X} .25$

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Problem 8

Which of the following technologies requires a logical connection between the sending and receiving devices?
A. Circuit switching
B. Virtual-circuit packet switching
C. Message switching
D. High-density circuit switching

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Problem 9

Which of the following technologies require dialup access? (Choose the two best answers.)
A. FDDI
B. ISDN
C. Packet switching
D. The PSTN

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Problem 10

Which of the following is an advantage of ISDN over the PSTN?
A. ISDN is more reliable.
B. ISDN is cheaper.
C. ISDN is faster.
D. ISDN uses $53 \mathrm{Kbp}$ fixed-length packets.

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