関連ワード:  data link layer physical layer    data link layer osi layer    data link layer vs physical layer    difference between data link layer and physical layer    physical layer data link layer network layer    data link layer addresses are logical and network layer addresses are physical    devices operating in data link layer and physical layer    physical layer and data link layer in computer network    the data link.layer provides data to the physical.layer in what form    osi model data link physical layers tcp ip layer