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200-301 · Question #847

Which layer of the TCP/IP model manages the transmission of binary digits across an Ethernet cable?

The correct answer is B. physical. The Physical layer of the TCP/IP model is responsible for the electrical, mechanical, and functional specifications for transmitting raw binary digits across a physical medium like an Ethernet cable.

Submitted by kavita_s· Mar 5, 2026

Question

Which layer of the TCP/IP model manages the transmission of binary digits across an Ethernet cable?

Options

  • Anetwork
  • Bphysical
  • Cdata link
  • Dtransport

How the community answered

(47 responses)
  • A
    4% (2)
  • B
    91% (43)
  • C
    2% (1)
  • D
    2% (1)

Why each option

The Physical layer of the TCP/IP model is responsible for the electrical, mechanical, and functional specifications for transmitting raw binary digits across a physical medium like an Ethernet cable.

Anetwork

The Network layer is concerned with logical addressing (IP addresses) and routing packets between different networks.

BphysicalCorrect

The Physical layer is the lowest layer of the TCP/IP model, handling the physical connection and the actual transmission of unstructured raw bit stream over a physical medium such as an Ethernet cable, including signal encoding and decoding.

Cdata link

The Data Link layer handles frame transmission within a local network segment, error detection, and physical addressing (MAC addresses), but relies on the Physical layer for bit transmission.

Dtransport

The Transport layer provides end-to-end communication services, such as connection management and reliable data transfer, for applications.

Concept tested: TCP/IP model Physical layer function

Source: https://learn.microsoft.com/en-us/training/modules/network-fundamentals/7-tcp-ip-model

Topics

#TCP/IP model#physical layer#Ethernet

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