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

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问题 In(66)the strength of the carder 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、Coaxial cable
B、Optical fiber
C、Unshielded Twisted-pair Cable
D、Shielded Twisted-pair Cable

答案B

解析 Optical fiber 译为光纤。Coaxial cable 译为同轴电缆。Unshielded Twisted-pair Cable 译为非屏蔽双绞线。Shielded Twisted-pair Cable 译为屏蔽双绞线。所以答案为B。
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