Physical, Encoding or Signaling?

About this interactive

The lesson splits Layer 1 into three components: - **Physical:** the hardware of the connection. NICs at each end, the media between them, the connectors, and the exact tolerances that let one maker's plug fit another maker's jack. - **Encoding:** lining up the ones and zeros in an order the other side understands. A start bit, an end bit, parity bits so the receiver can check what arrived. - **Signaling:** turning those bits into something physical. Voltage on and off on copper, a light flashing on fiber, a wave changed in the air. Morse code shows the difference: the chart of dots and dashes is encoding; flashing it with a flashlight or tapping it down a wire is signaling.

What you'll learn

Sort a detail of a Layer 1 connection into the component it belongs to: the physical hardware, the encoding, or the signaling
Tell encoding, the agreed order and meaning of the bits, from signaling, turning those bits into voltage, light or waves

Aligned to

CompTIA Network+

1.1 Explain concepts related to the Open Systems Interconnection (OSI) reference model.

Key terms

Physical Layer: Layer 1 of the OSI model, responsible for the transmission of raw bits over a physical medium.
Encoding: The process of arranging binary data (ones and zeros) into a defined order so the receiving device can correctly interpret the transmitted information.
Signaling: The process of converting encoded binary data into a physical form — such as electrical voltage, pulses of light, or radio waves — for transmission across a network medium.

Topics

Physical Layer Encoding Signaling Interactive Categorize

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