[&] Which of the following statements are true about CSUs and DSUs? (Select two answers)
- A CSU understands Carrier signalling, voltage-levels, timing, etc -- Correct
- A CSU connects directly to DTE equipment
- A DSU connects directly to DTE equipment -- Correct
- A DSU understands Carrier signalling, voltage-levels, timing, etc

[&] Which of the following is an example of TDM? (Select the best answer)
- When Sally needs to transmit on a cable her data can start as long as nobody else is transmitting at the same time.
- When Sally needs to transmit on a cable her data is always sent during the first 1/10th of every second. -- Correct
- When Sally needs to transmit on a cable her data is always sent using an electrical frequency assigned only to her.
- When Sally needs to transmit on a cable her data is always sent using a wavelength of light assigned only to her.

[&] Which of the following would be an example of CPE? (Select the best answer)
- A router located at the WAN provider's location
- The wiring/cables installed by your WAN provider
- A laptop owned and managed by you -- Correct
- A router located in your home but owned and managed by your ISP