COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK PROTOCOLS AND STANDARDS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Layer 1-Physical
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Layer 2-Data Link
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Layer 3-Network
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Layer 4-Transport
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Layer 5-Application
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Detailed explanation-1: -The Physical layer has two responsibilities: it sends bits and receives bits. Bits come only in values of 1 or 0. The Physical layer communicates directly with the various types of actual communication media.
Detailed explanation-2: -The physical layer is responsible for sending computer bits from one device to another along the network. Its role is determining how physical connections to the network are set up, as well as how bits are represented into predictable signals–as they are transmitted either electrically, optically or by radio waves.
Detailed explanation-3: -Layer 1 of The OSI Model: Physical Layer defines electrical and physical specifications for devices. The physical layer defines the relationship between a device and a transmission medium, such as a copper or optical cable.
Detailed explanation-4: -In the seven-layer OSI model of computer networking, the physical layer or layer 1 is the first and lowest layer: the layer most closely associated with the physical connection between devices.