Physical layer
OverviewPHYRolePhysical signaling sublayerRelation to the Internet protocol suiteServicesTechnologies
A PHY, an abbreviation for physical layer, is an electronic circuit, usually implemented as an integrated circuit, required to implement physical layer functions of the OSI model in a network interface controller. A PHY connects a link layer device (often called MAC as an acronym for medium access control) to a physical medium such as an optical fiber or copper cable. A PHY
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