题目内容
_______ uses standard telephone lines to provide high-speed connections.
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The range of Wi-Fi networks using microwave connections is being extended over greater distances using a new technology known as _______.
_______ transmits data as pulses of light through tiny tubes of glass.
A(n) _______ is a network where the nodes are in close physical proximity to each other.
A network _______ is a device that allows one LAN to be linked to other LANs or to larger networks.
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