An organization implements network segmentation using VLANs. At which OSI layer does VLAN tagging primarily operate, and which layer processes these tags?

The correct answer is B: Layer 2; Layer 2. VLAN tagging operates at Layer 2 (Data Link Layer) using 802.1Q tags, and switches process these tags at Layer 2 to isolate traffic.

Which of the following best describes encapsulation in the OSI model?

The correct answer is B: The process of adding headers and trailers to data as it moves down the OSI layers. Encapsulation is the process of adding protocol-specific headers and trailers to data at each layer as it moves down from the Application Layer to the Physical Layer.

Which of the following statements correctly describes the role of the Session Layer (Layer 5) in the OSI model?

The correct answer is B: It manages conversations between applications, including establishing, maintaining, and terminating sessions. The Session Layer (Layer 5) manages dialogues between applications, handling session establishment, maintenance, synchronization, and termination.

Which statement BEST describes the difference between connection-oriented and connectionless communication in the OSI model?

The correct answer is B: TCP (Layer 4) is connection-oriented; UDP (Layer 4) is connectionless. TCP establishes a connection before data transfer (handshake), while UDP sends data without pre-established connection. Both are Layer 4 protocols.

The TCP/IP model has 4 layers, while the OSI model has 7 layers. Which OSI layers are combined into the TCP/IP Application Layer?

The correct answer is A: Layers 5, 6, and 7. The TCP/IP Application Layer combines the OSI Session Layer (5), Presentation Layer (6), and Application Layer (7).

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Networking
OSI Model

OSI, TCP/IP, protocols, routing, security

26 Q 1 Topics Take Mock Test

Difficulty: All Easy Medium Hard 21–26 of 26

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All OSI Model 100

Q.21 Easy OSI Model

Which of the following layers of the OSI model is responsible for converting data into signals suitable for transmission over a physical medium?

A Physical Layer

B Data Link Layer

C Network Layer

D Transport Layer

Correct Answer: A. Physical Layer

EXPLANATION

The Physical Layer (Layer 1) handles the conversion of data into electrical signals, light pulses, or radio waves for transmission over physical media.

Test

Q.22 Easy OSI Model

Which layer of the OSI model is responsible for managing dialogs and session establishment?

A Presentation Layer (Layer 6)

B Session Layer (Layer 5)

C Transport Layer (Layer 4)

D Application Layer (Layer 7)

Correct Answer: B. Session Layer (Layer 5)

EXPLANATION

The Session Layer (Layer 5) manages, establishes, and terminates communication sessions between applications.

Test

Q.23 Easy OSI Model

The Physical Layer of the OSI model deals with which of the following?

A Logical addressing and routing

B User authentication and data encryption

C Electrical signals, cables, and hardware devices

D Application-level protocols and services

Correct Answer: C. Electrical signals, cables, and hardware devices

EXPLANATION

Layer 1 (Physical Layer) handles the actual transmission of raw bits over physical media like cables, fiber optics, and wireless signals.

Test

Q.24 Easy OSI Model

Which protocol operates at the Transport Layer (Layer 4) of the OSI model?

A IP and ICMP

B TCP and UDP

C HTTP and HTTPS

D ARP and DHCP

Correct Answer: B. TCP and UDP

EXPLANATION

TCP (Transmission Control Protocol) and UDP (User Datagram Protocol) are core Transport Layer protocols that manage end-to-end communication.

Test

Q.25 Easy OSI Model

What is the primary function of the Data Link Layer in the OSI model?

A Encryption and decryption of data

B Frame formatting and MAC addressing

C Session management

D DNS resolution

Correct Answer: B. Frame formatting and MAC addressing

EXPLANATION

The Data Link Layer (Layer 2) uses MAC addresses for physical addressing and creates frames for transmission over physical media.

Test

Q.26 Easy OSI Model

Which layer of the OSI model is responsible for routing packets across networks?

A Network Layer (Layer 3)

B Data Link Layer (Layer 2)

C Transport Layer (Layer 4)

D Application Layer (Layer 7)

Correct Answer: A. Network Layer (Layer 3)

EXPLANATION

The Network Layer (Layer 3) handles routing, IP addressing, and logical addressing to move data across different networks using routers.

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