physical layer


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physical layer

(networking)
Layer one, the lowest layer in the OSI seven layer model. The physical layer encompasses details such as electrical and mechanical connections to the network, transmission of binary data as changing voltage levels on wires or similar concepts on other connectors, and data rates.

The physical layer is used by the data link layer.

Example physical layer protocols are CSMA/CD, token ring and bus.
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

physical layer

The processing in a network protocol that transmits the bits over the wire or fiber. The physical layer is layer 1 of 7 in the OSI model. Also known as the "PHY" layer. See TCP/IP, OSI model and physical layer switch.
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References in periodicals archive ?
Beyond automated work-order management and guided moves, adds and changes (MACs), physical layer network-management systems can offer return-on-investment benefits that reduce the total cost of network ownership.
KEY SPEC: The 8-bit microcontroller has an on-chip Medium Access Controller (MAC) and Physical Layer Device (PHY).
Version 3.0 of the system includes full Web-based management for the physical layer. Network managers can complete network troubleshooting and control from remote locations via standard Web browsers, enabling them to view, configure and monitor the physical layer from any location.
802.15.3 specifies a Physical Layer (PHY) using 2.4GHz spread spectrum technology, but WiMedia members are hoping to combine the MAC with an Ultra Wide-Band PHY for a super-fast wireless multimedia standard.
CANbus TD or CANbus TDM and a Wave Runner 6000A Series scope is suitable for locating CAN Bus physical layer problems and for debugging CAN Bus controllers and systems, allowing the user to correlate physical layer signals with protocol layer data information.
Its physical layer has been engineered to be compatible with Serial ATA's physical layer, giving users the choice of populating their systems with Serial Attached SCSI or Serial ATA hard disk drives, or a combination of both.
The LanScaper network tester combines the functions of a high-end cable tester and length-measurement device with the capability to monitor and correct network problems connected with the physical layer and link conditions of the network.
Wave2Wave Solution, the global provider of physical layer automation, has introduced a small form factor robotic fiber switch, ROME Mini, the company said.
Majorly Fiber Optic Security is categorized into; Physical Layer Fiber Optic Security, and Data Layer Fiber Optic Security.

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