5. The all-optical network will one day include DWDM systems, optical gateways, and optical cross-connects. It will permeate the entire public network, including the enterprise access, metropolitan, regional, and long-haul backbone segments.

6. What is the simple network management language most widely used by enterprises and emerging carriers today?

7. What traditional network structure will full cross-connect optical-fiber meshes more likely emulate?

8. Enterprises find that leasing additional fibers is not only expensive but also often effectively unfeasible. This is because securing the necessary regulatory permits to lease, bury, and connect additional fiber strands takes ____________.

9. SONET/SDH is an effective technology for aggregating multiple low-speed (less than OC–3) data applications and multiple sites onto a common infrastructure linked out to the wide area. But it is not best suited as the underlying technology for the...