Fill in the blank 1. The earth can be fully covered by at least _________________ satellites. 2. To enable all citizens with affordable basic telephone service, most incumbent operators are committed to the obligation of providing _____________________. 3. The three key components of a telecommunications network are ______________, __________________ and ___________________. 4. The broadband network can facilitate innovation because it can ______________________the interaction cycle and enable interaction with __________________ parties. 5. According to OFCA, the USC for 2017 in Hong Kong is HK$0.071 per number per month. As is in December 2017, operator X has 400,000 mobile users, 300,000 fixed users, and has been assigned with 600,000 mobile numbers, 400,000 fixed numbers in total by OFCA by December 2017, then operator X needs to pay HK$ _____________ for its universal service contribution in December 2017. 6. Information infrastructure is a critical sector of economy. It can generate both _________________economic return and _________________ economic return. 7. The theory of the _______________is that our culture and economy is increasingly shifting away from a focus on a relatively small number of "hits" (mainstream products and markets) at the head of the demand curve and toward a huge number of niches in the tail. 8. Traditionally, it has been believed that it is the company that always generates value for users. However, in the scenario of _________________ economy, it is believed that users may generate value for the company once appropriate tool-kits are provided to some users. 9. In addition to economic benefits, the information infrastructure also has __________________ benefits. 10. The MPLS technology can ________________ QoS of the network.