Now read the text again and find out if the following statements are true (T) or false (F)?
Now read the text again and answer the following questions.
Part III (… адрес интернет-странички с видеороликами…) FIBRE CABLE (00:24) PRE-LISTENING 14. What is optical fibre used for? 15. What are the spheres of usage of optical fibre? 16. What is optical fibre made from? 4. Study the meaning of the following words: jacket = an outer cover around something (ex. - a pipe) buffer = a protector = a thing that protects something more important cladding = a covering of a hard material, used as protection core = the most important and central part of something Which of these words have a similar meaning and generally one purpose? WHILE-LISTENING Watch the video and answer the following questions: 5. How many elements does the cable in the track consist of? 6. What are they? POST-LISTENING 7. Try to remember the elements of the cable and tell about its structure without watching the video.
OPTICAL TRANSMISSION TECHNOLOGY (01:35) PRE-LISTENING 1. What is optical fibre? 2. What is optical fibre used for? 3. What are the advantages of optical fibre usage? 4. Do you know the following words? Study the meaning of the words: “network”, “data”, “to consume”, “fluctuation”. WHILE-LISTENING Watch the video and answer the following questions: 00:00 – 00:46 5. Why is it a growing need for the development of optical communication network? 6. What bandwidth is being discussed nowadays as the way to upgrade the existing system? 7. When did the development of the world first 40Gbps-technology begin? 00:47 – 01:05 8. Who and what is the speaker? 01:06 – end 9. How is the optical transmission module characterized? 10. How much electricity does it consume? 11. How many modules of this kind have been produced? 12. Why was a test organized? POST-LISTENING 13. Complete the summary of the video track. Fill in the gaps with a suitable word.
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