Chapter 10: Wide Area Networks (WAN)

1. Which of the following devices is used on a WAN to convert synchronous serial signals into digital signals?

• IDS

• CSU/DSU

• Proxy

• Modem

2. Which of the following are the customer's responsibility to maintain? (Select two.)

• Local loop

• CO

• DTE

• DCE

• CPE

3. Which of the following describe the channels and data transfer rates used for ISDN BRI? (Select two.)

• One D channel operating at 16 Kbps.

• Two B channels operating at 64 Kbps each.

• 23 B channels operating at 64 Kbps each.

• One D channel operating at 64 Kbps.

• 30 B channels operating at 64 Kbps each.

4. Which of the following technologies uses variable-length packets, adds labels to packets as they enter the WAN cloud, and uses the labels to switch packets and prioritize traffic?

• ISDN

• ATM

• MPLS

• SONET

5. What is the speed of an OC-3 connection?

• 622 Mbps

• 34 Mbps

• 155 Mbps

• 45 Mbps

6. Which network type divides transmitted data into smaller pieces and allows multiple communications on the network medium?

• Circuit-switched

• Managed

• Packet-switched

• Multiplexed

7. When implementing a Multiprotocol Label Switching (MPLS) WAN, which data unit is managed by the routers at different sites?

• Frames

• Bits

• Packets

• Datagrams

8. Which of the following describes the lines used in a local loop for dial-up telephone access?

• POTS

• T1

• J1

• SONET

• MPLS

9. You are traveling throughout North America to many metropolitan and rural areas. Which single form of internet connectivity provides the greatest potential connectivity wherever you travel?

• DSL

• Broadband cable

• ISDN

• PSTN

10. Which of the following correctly describes the T1 carrier system? (Select two.)

• T1 lines use four pairs of copper wire.

• T1 lines have a maximum data rate of 2.4 Gbps.

• A single T1 channel can transfer data at 64 Kbps.

• T1 lines use two pairs of copper wire.

• T1 lines use 48 separate channels.