nerdexam
GIAC

GCFA · Question #94

Which of the following is a correct sequence of different layers of Open System Interconnection (OSI) model?

The correct answer is C. Physical layer, data link layer, network layer, transport layer, session layer, presentation layer, and. The OSI model defines seven layers in a specific order from bottom to top: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

Advanced Incident Response & Digital Forensics Fundamentals

Question

Which of the following is a correct sequence of different layers of Open System Interconnection (OSI) model?

Options

  • APhysical layer, data link layer, network layer, transport layer, presentation layer, session layer, and
  • Bapplication layer, presentation layer, network layer, transport layer, session layer, data link layer,
  • CPhysical layer, data link layer, network layer, transport layer, session layer, presentation layer, and
  • DPhysical layer, network layer, transport layer, data link layer, session layer, presentation layer, and

How the community answered

(16 responses)
  • A
    13% (2)
  • C
    81% (13)
  • D
    6% (1)

Why each option

The OSI model defines seven layers in a specific order from bottom to top: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

APhysical layer, data link layer, network layer, transport layer, presentation layer, session layer, and

This option incorrectly swaps Layers 5 and 6 by placing the Presentation layer before the Session layer.

Bapplication layer, presentation layer, network layer, transport layer, session layer, data link layer,

This option begins with the Application layer at the bottom and misplaces the Network layer, which contradicts the defined OSI ordering.

CPhysical layer, data link layer, network layer, transport layer, session layer, presentation layer, andCorrect

Option C correctly lists all seven OSI layers in ascending order - Physical (1), Data Link (2), Network (3), Transport (4), Session (5), Presentation (6), and Application (7) - which matches the standard defined by ISO/IEC 7498-1. This ordering reflects how data is encapsulated downward when sending and de-encapsulated upward when receiving across a network stack.

DPhysical layer, network layer, transport layer, data link layer, session layer, presentation layer, and

This option incorrectly swaps the Data Link layer (Layer 2) and the Network layer (Layer 3), placing Network directly above Physical.

Concept tested: OSI model seven-layer sequence and ordering

Source: https://learn.microsoft.com/en-us/windows-hardware/drivers/network/windows-network-architecture-and-the-osi-model

Topics

#OSI model#network layers#networking fundamentals

Community Discussion

No community discussion yet for this question.

Sign up to join the discussion
Full GCFA Practice