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.
[fiz-i-kuh l] /ˈfɪz ɪ kəl/ adjective 1. of or relating to the body: physical exercise. 2. of or relating to that which is material: the physical universe; the physical sciences. 3. noting or pertaining to the properties of matter and energy other than those peculiar to living matter. 4. pertaining to the physical sciences, especially […]
adjective 1. See example at (def 1).
- Physical map
noun a depiction of the identifiable landmarks on DNA, such as genes, and measured in base pairs Usage Note science
noun 1. the branch of medicine dealing with the diagnosis and treatment of disease and injury by means of physical agents, as manipulation, massage, exercise, heat, or water. noun 1. the branch of medicine devoted to the management of physical disabilities, as resulting from rheumatic disease, asthma, poliomyelitis, etc See also rehabilitation (sense 2) physical […]