Self Skill Test - Optical Network
Management
1. Optical networks are based
on the emergence of the ______ layer in ______
networks.a. optical; transport
b. transport; optical
c. optical; integrated
d. optical; high-capacity
2. In the ______ a revolution in the technology for telecommunications networks began, spawned by the
use of a relatively unassuming technology: ______.
a. early 1990s; fiber optic cable
b. early 1980s; synchronous cable
c. early 1980s; fiber optic cable
d. early 1990s; asynchronous cable
3. The one aspect of SONET that has allowed it to survive during a time of tremendous changes in network
capacity needs is its ______.
a. versatility
b. scalability
c. fiber capacity
d. functionality
4. One of the great revenue-producing aspects of optical networks is the ability to resell ____ rather than
_____.
a. bandwidth; fiber
b. fiber; bandwidth
c. wavelength; bandwidth
d. single fiber; double fiber
5. The first incarnation of WDM was:
a. broadband WDM
b. the erbium-doped optical amplifier
c. dense WDM
d. narrowband lasers
6. A fiber Bragg grating is a small section of fiber that has been modified to create periodic changes in the
index of refraction.
a. True
b. False
7. One of the most promising technologies for optical networks is the semiconductor optical amplifier
(SOA).
a. True
b. False
8. A wavelength converter provides functionality similar to an electrical switch by routing an incoming
wavelength to a variety of physical output ports.
a. True
b. False
9. One of the benefits of a long-haul network is its conservative use of bandwidth.
a. True
b. False
10. The basic element in the optical network is the wavelength.
a. True
b. False
