What is one main characteristic of the data link layer?

What is one main characteristic of the data link layer?

    • It generates the electrical or optical signals that represent the 1 and 0 on the media.
    • It converts a stream of data bits into a predefined code.
    • It shields the upper layer protocol from being aware of the physical medium to be used in the communication.
    • It accepts Layer 3 packets and decides the path by which to forward the packet to a remote network.

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