Provides protection against network eavesdropping and signal interference and works at the physical layer of the osi model.

Shielded twisted pair (STP)

Explanation:The first layer of the OSI(Open Systems Interconnection Model) model that is physical later contains the cable which helps in elimination of the cross talk and provides ground.It has a extra layer of shield in the cable wire .It also protects the device from facing interference due to electromagnetism or eavesdropping. It is used in the environment which is noisy.

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