《计算机英语》Unit 7.pptVIP

* * * * * * * * * * * * Unit 7 Computer Network 计算机英语教程 教学课件 Contents Part 1 Reading and Translating Section A: Ethernet Section B: Wi-Fi Section C: Location-based Service Part 2 Simulated Writing: Instructions Part 3 Listening and Speaking Dialogue: Setting up Wireless Network Listening Comprehension: IPv6—the Next Generation Dictation: Router 1.1 Ethernet Introduction History General Description 1.1 Ethernet Complex Sentences Original: The combination of the twisted pair versions of Ethernet for connecting end systems to the network, along with the fiber optic versions for site backbones, is the most widespread wired LAN technology.. Translation:以太网的用于将终端系统连接到网络的双绞线版本与用于场地主干网的光纤版本的组合，是最为广泛使用的有线局域网技术。 1.1 Ethernet Complex Sentences Original: These systems replaced the coaxial cable on which early Ethernets were deployed with a system of hubs linked with unshielded twisted pair (UTP), ultimately replacing the CSMA/CD scheme in favor of a switched full duplex system offering higher performance. Translation:这些系统用以非屏蔽双绞线链接的网络集线器系统替代了基于同轴电缆所部署的早期以太网，并最终选择一个能提供更高性能的可交换全双工系统替代了载波侦听多路访问/冲突检测模式。 1.1 Ethernet Exercises I. Read the following statements carefully, and decide whether they are true (T) or false (F) according to the text. ___1．The name “Ethernet” was derived from the similar fundamentals between computers communicating over a shared coaxial cable and radio broadcast systems over the ether. ___2．Ethernet, token ring, FDDI and ARCNET LAN are all LAN standards. ___3．Data packets are blocks of data that are individually sent and delivered, via which Ethernet stations communicate with each other. ___4．A specific protocol can be identified via the packet type it uses in current Ethernet. ___5．Now, most manufacturers build smaller network card with decreasing cost and the reduced panel space in PC.. 1.1 Ethernet II. Choose the best answer to each of the following questions. 1．Which of the following has been outdated among wired LAN technology? A．The shielded twisted