11.1.7 Practice Questions

Question: What is the speed of an OC-3 connection

Answer: 155 Mbps

Question: To access the internet through the PSTN, what kind of connectivity device must you use

Answer: Modem

Question: 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

Answer: MPLS

Question: Which of the following are characteristics of MPLS

Answer: -Supports variable-length data units

-Adds lables to data units

Question: Which of the following are characteristics of ATM

Answer: -Uses fixed-length cells of 53 bytes

-Adds labels to data units

Question: Which of the following are the the WAN service provider’s responsibility to maintain

Answer: -CO, DCE, Local loop, PSE

Question: Which network type divides transmitted data into smaller pieces and allows multiple communications on the network medium

Answer: packet-switched

Question: Which network type establishes a dedicated physical connection between two hosts in order to transmit time-sensitive data

Answer: circuit-switched

Question: Which of the following WAN technologies provides packet switching over high-quality digital lines at speeds greater than 1.544 Mbps

Answer: frame relay

Question: You are implementing internet connectivity for a new start-up company. Your client will provide online storefronts for retailers. To do this, they have calculated that their internet connection must provide a data rate of at least 20-30 Mbps.

Answer: T3

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