Examkin

Question

Difficulty: MediumOSI Model Layers and Functions

A network administrator is inspecting packet captures from a user workstation accessing an online banking portal. After establishing a reliable transport connection, the client and server begin exchanging messages to negotiate cipher suites, format character encodings, and perform data encryption. At which layer of the OSI reference model do these data translation, formatting, and encryption functions reside?

  1. Presentation Layer (Layer 6)Answer
  2. B
    Transport Layer (Layer 4)
  3. C
    Session Layer (Layer 5)
  4. D
    Application Layer (Layer 7)

Answer

Presentation Layer (Layer 6)
The correct answer identifies the Presentation Layer (Layer 6), which serves as the network's data translator. It handles tasks such as data encryption/decryption, compression, and formatting code conventions (such as ASCII, EBCDIC, JPEG, or TLS payload formatting) to ensure compatible communication between disparate systems.

Step-by-Step Solution

1
Analyze the primary functions described in the network scenario.
Identified functions: negotiating cipher suites, converting syntax/character encodings, and performing data encryption.
Determining the operational boundary allows precise mapping to OSI layer responsibilities.
2
Map the identified functions to the corresponding OSI model layer.
Data encryption, compression, and syntax transformation are core responsibilities of Layer 6.
Layer 6 ensures data delivered from Layer 7 is readable by the receiving system's application layer.

Key Concept

OSI Presentation Layer (Layer 6) responsibilities
Estimated Time:1m 15s
Rate this question

Topics

OSI Model Layers and Functions

More questions from this topic