(9)是以科学、技术和实践经验的综合成果为基础，对重复性事物和概念所做的统一规定，经有关方面协商一致，由一个公认机构或主管机构批准，以特定形式发布作为共同遵守的准则和依据。

(78)

(79)

(76)

(77)

(71) is a one -way function that takes an arbitrarily long piece of plaintext and from it computes a fixed-length bit string.

  (72) is a protocol that most USENET machines now use it to allow news articles to propagate from one machine to another over a reliable connection.

  (73) is an approach preferred by cable TV providers. In this solution the fiber terminates at an optoelectrical converter and the final segment is a shared coaxial cable.

  (74) is a device used to connect two separate network that use different communication protocol.

  (75) is a digital-to-digital polar encoding method in which the signal level is always either positive or negative.

(73)

(74)

(71)

(72)

In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet.

 Open Shortest Path First(OSPF) is a(66)routing algorithm that(67)work done on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires(68)processing power. The Dijkstra algorithm is used to calculate(69)OSPF routing table updates only take place when necessary,(70)at regular intervals.