Question 21

SONET/SDH uses a highly accurate central timing source that is distributed to all SONET/SDH nodes within the network (i.e., SONET/SDH uses a synchronous network timing approach).

True

False

10 points

Question 22

Select the correct statement(s) regarding SONET and SDH.

		a. STS describes the SONET electrical signal, while STM describes the SDH electrical signal
		b. OC describes the optical signal on both SONET and SDH
		c. An STS-3 equals an STM-1, which is 155.52 Mbps
		d. All of the above are correct

10 points

Question 23

A SONET STS-1 frame is comprised of _______ bytes, with a frame rate of ________ frames per second.

		a. 9 bytes, 8000 fps
		b. 910 bytes, 64,000 fps
		c. 810 bytes, 8000 fps
		d. 672 bytes, 8100 fps

10 points

Question 24

What is a true statement regarding WDM?

		a. WDM is another name for SONET.
		b. SONET can be implemented onto one of the wavelengths in a DWDM multiplexer.
		c. Since WDM and SONET are competing optical signal standards, they cannot be used together on the same fiber optic cable.
		d. There are no true statements above.

10 points

Question 25

A SONET network can be supported on a single WDM optical channel (i.e., SONET over WDM).

True

False