What is Layer 1 of The OSI Model
Correct answer: C. Physical
- A. Transport Layer
- B. datalink
- C. Physical
- D. Network
Explanation
The OSI model (Open Systems Interconnection model) is a conceptual framework that defines seven layers for communication between network systems. It provides a common standard for how different devices and software can communicate over a network.The physical layer is the lowest layer in the OSI model. It is responsible for the physical transmission of data bits over a communication channel. It defines the electrical, mechanical, and procedural specifications for transmitting raw data between network devices. Here are some of the specific functions of the physical layer:● Defines the characteristics of the transmission medium (e.g., cable, fiber optic)● Defines the type of signaling (e.g., voltage levels, light pulses)● Defines the data encoding/decoding schemes (e.g., binary coding)● Defines the physical connector standardsThe text mentions protocol 802. Protocols are sets of rules that govern how devices communicate on a network. However, the question itself is not about protocol 802.
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Networking covers LAN, MAN, WAN and wireless networks, network topologies, transmission media, devices such as switches, routers and modems, and the OSI and TCP/IP models. Internet concepts include IP addresses, DNS, URLs, web browsers, email, protocols such as HTTP, HTTPS, FTP and SMTP, and basic network security.
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