1. Optical networks are based on the emergence of the ______ layer in ______ networks.

2. In the ______ a revolution in the technology for telecommunications networks began, spawned by the use of a relatively unassuming technology, ______.

3. The one aspect of SONET that has allowed it to survive during a time of tremendous changes in network capacity needs is its ______.

4. One of the great revenue-producing aspects of optical networks is the ability to resell ____ rather than _____.

5. The first incarnation of WDM was __________.

6. A fiber Bragg grating is a small section of fiber that has been modified to create periodic changes in the index of refraction.

7. One of the most promising technologies for optical networks is the SOA.

8. A wavelength converter provides functionality similar to an electrical switch by routing an incoming wavelength to a variety of physical output ports.

9. One of the benefits of a long-haul network is its conservative use of bandwidth.

10. The basic element in the optical network is the wavelength.