2. 计算机
  3. In(66)the strength of the carrier signal is varied to represent binary 1 or 0.(67)is a system that can map a name to an address

In(66)the strength of the carrier signal is varied to represent binary 1 or 0.(67)is a system that can map a name to an address

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问题 In(66)the strength of the carrier signal is varied to represent binary 1 or 0.(67)is a system that can map a name to an address and conversely an address to an name.(68)is a three -way handshaking authentication protocol that it’s packets are encapsulated in the point - to -point protocol.(69)is an approach that enables an ATM Switch to behave like a LAN switch.(70)is an guided media which is made of glass or plastic and transmits signals in the form of light.
选项 A、Optical fiber
B、Coaxial cable
C、Shielded Twisted-pair Cable
D、Unshielded Twisted-pair Cable
答案B
解析 这里解释光纤的概念，所以只能选B。
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