PHYSICAL LAYER AND TRANSMISSION MEDIA
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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mechanical specifications of electrical connectors and cables
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electrical specification of transmission line signal level
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specification for IR over optical fiber
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all of the mentioned
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Detailed explanation-1: -The physical layer provides an electrical, mechanical, and procedural interface to the transmission medium. The shapes and properties of the electrical connectors, the frequencies to broadcast on, the line code to use and similar low-level parameters, are specified by the physical layer.
Detailed explanation-2: -The physical layer (also known as layer 1) deals with bit-level transmission between different devices and supports electrical or mechanical interfaces connecting to the physical medium for synchronized communication.
Detailed explanation-3: -1 Answer. The best explanation: In asynchronous serial communication, the communication is not synchronized by clock signal. Instead of a start and stop signaling and flow control method is followed.
Detailed explanation-4: -The four basic layers of physical security are design, control, detection, and identification. For each of these layers, there are different options that can be utilized for security. Physical security design refers to any structure that can be built or installed to deter, impede, or stop an attack from occurring.