Top 30 OSI Model Interview Questions and Answers
Updated 2 Aug 2025

Asked in Firstsource Solutions and 2 others

Q. What is the OSI Model and can you explain its layers?
The OSI Model is a conceptual framework that standardizes the functions of a communication system into seven layers.
The OSI Model stands for Open Systems Interconnection Model.
It was developed by the International Organization for Standardization (IS...read more

Asked in BNP Paribas

Q. What are the OSI and TCP/IP models?
OSI and TCP/IP models are reference models used to describe how data is transmitted over a network.
OSI model has 7 layers, while TCP/IP model has 4 layers
OSI model is theoretical, while TCP/IP model is practical
OSI model is used for teaching and unde...read more

Asked in Capgemini Engineering

Q. What are TCP/IP and the OSI model?
TCP/IP is a protocol used for communication between devices on the internet. OSI model is a conceptual framework for network communication.
TCP/IP is a suite of protocols that governs communication between devices on the internet.
OSI model is a concep...read more

Asked in Ericsson

Q. Explain the OSI model devices on each layer.
The OSI model consists of 7 layers, each with its own set of devices.
Layer 1 (Physical): Devices include hubs, repeaters, and cables.
Layer 2 (Data Link): Devices include switches, bridges, and NICs.
Layer 3 (Network): Devices include routers, IP addre...read more

Asked in Dev Bhumi Cold Chain

Q. On which layer does a switch operate?
A switch primarily operates at the Data Link layer (Layer 2) of the OSI model, facilitating local area network communication.
Switches use MAC addresses to forward data frames between devices on the same network.
They reduce network collisions by creat...read more

Asked in Emami

Q. Explain the OSI model and the function of each layer.
The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.
Layer 1 (Physical): Deals with physical connections and data transmission. Example: Ethernet cables.
Layer 2 (Data Lin...read more

Asked in Vedantu

Q. How does communication happen between the 7 layers of two computers?
Communication between 7 layers of 2 computers happens through the OSI model.
OSI model defines 7 layers of communication
Each layer has a specific function and communicates with the corresponding layer on the other computer
Data is encapsulated and de-e...read more

Asked in Akamai Technologies

Q. On what layer does ping operate?
Ping works on the network layer of the OSI model.
Ping is a network utility used to test connectivity between two devices.
It sends ICMP (Internet Control Message Protocol) packets to the destination device.
ICMP is a protocol that operates at the netwo...read more

Asked in National Informatics Centre

Q. What is OSI model, networking, sattalite communication.
OSI model is a conceptual framework for understanding network communication. Satellite communication is a type of wireless communication.
OSI model has 7 layers, each with a specific function in network communication
Networking involves connecting devi...read more

Asked in Tata Communications

Q. What is the OSI model? Explain the layers of the OSI model.
The OSI model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system.
OSI stands for Open Systems Interconnection.
It has 7 layers: Physical, Data Link, Network, Transport, Sessi...read more

Asked in Web Development Company

Q. Which layer is used to transfer data?
The data transfer happens at the Transport layer.
The Transport layer is responsible for end-to-end communication between devices.
It ensures reliable data transfer and error correction.
Examples of protocols at this layer include TCP and UDP.

Asked in V5 Global Services

Q. What is a network, and what is the OSI model?
A network is a group of interconnected devices that can communicate with each other. OSI model is a conceptual framework for network communication.
Network is a collection of devices connected together to share resources and information.
OSI model is a...read more

Asked in Clover Infotech

Q. what is osi and networking concepts
OSI (Open Systems Interconnection) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.
OSI model is divided into 7 layers, each responsible for specific functions in networking....read more

Asked in Dr. Reddy's

Q. What are the AQ layers?
AQ layers refer to the different layers of abstraction in the architecture of an autonomous vehicle.
AQ layers include perception, planning, control, and actuation.
Perception layer involves sensors and perception algorithms to detect and interpret the...read more

Asked in Black Box Corporation

Q. How does data flow through the OSI model?
Data flows through OSI model in a structured manner through different layers.
Data is encapsulated into frames at the Application layer
Frames are then segmented into packets at the Transport layer
Packets are further divided into segments at the Networ...read more

Asked in PwC

Q. What is the OSI model, and can you explain its seven layers?
The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.
Layer 1 - Physical layer: Deals with physical connections and transmission of raw data. Example: Ethernet cables
Layer...read more

Asked in NTT Data

Q. Explain the OSI model in the context of transmitting a packet.
The OSI model outlines seven layers that facilitate packet transmission across networks.
Layer 1: Physical - Transmits raw bitstream over a physical medium (e.g., Ethernet cables).
Layer 2: Data Link - Frames packets for transmission and handles error ...read more

Asked in Telstra

Q. On which layers does a firewall operate?
Firewall works on multiple layers of OSI model
Firewall operates on layers 3 (network layer) and 4 (transport layer) of the OSI model
It can filter traffic based on IP addresses, ports, protocols, and other criteria
Firewalls can also perform deep packe...read more

Asked in AKS IT

Q. OSI model and different protocol
The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven different layers.
The OSI model stands for Open Systems Interconnection model.
It consists of seven layers: Physical, Data Lin...read more

Asked in Rackspace

Q. OSI vs TCP/IP
OSI and TCP/IP are both networking models, but OSI has 7 layers while TCP/IP has 4 layers.
OSI stands for Open Systems Interconnection and TCP/IP stands for Transmission Control Protocol/Internet Protocol.
OSI has 7 layers: Physical, Data Link, Network...read more

Asked in Hewlett Packard Enterprise

Q. Packet flow in routers, osi model , etc
Packet flow in routers involves data transmission through different layers of the OSI model.
Packet flow starts at the network layer where packets are routed based on IP addresses.
Packets then move to the data link layer where MAC addresses are used f...read more

Asked in Wipro

Q. What is the OSI model and can you describe its layers?
The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven different layers.
Layer 1 - Physical layer: Deals with physical connections and transmission of raw data.
Layer 2 - Data link ...read more

Asked in CompuCom

Q. Explain the OSI and TCP models.
OSI and TCP models are networking models that define how data is transmitted between devices.
OSI model has 7 layers and TCP model has 4 layers
OSI model is a theoretical model while TCP model is a practical model
OSI model is used for understanding how...read more

Asked in TAC Security

Q. Explain the TCP-IP and OSI models and their differences.
TCP/IP and OSI are networking models used to facilitate communication between devices on a network.
TCP/IP is a 4-layer model used in the internet and most modern networks.
OSI is a 7-layer model used in academic and theoretical contexts.
TCP/IP is more...read more

Asked in Wipro

Q. Which layer does a switch operate on?
Switch is used at the data link layer of the OSI model.
Switches operate at Layer 2 of the OSI model.
They use MAC addresses to forward data within a local area network (LAN).
Switches improve network performance by reducing collisions and providing ded...read more

Asked in Tata Steel

Q. What is the TCP/IP protocol, and how does it work within the OSI model?
TCP/IP is a set of protocols used for communication over the internet. It works in the transport and network layers of the OSI model.
TCP/IP stands for Transmission Control Protocol/Internet Protocol.
TCP is responsible for ensuring reliable transmissi...read more

Asked in Ernst & Young

Q. What is the OSI model and its layers?
The OSI model is a conceptual framework that standardizes the functions of a communication system into seven layers.
The OSI model stands for Open Systems Interconnection model.
It was developed by the International Organization for Standardization (IS...read more

Asked in Nexpro Systems

Q. Compare the OSI and TCP/IP models.
OSI and TCP/IP models are both used to describe how data is transmitted over a network.
OSI has 7 layers while TCP/IP has 4 layers
OSI is a theoretical model while TCP/IP is a practical model
OSI is a top-down approach while TCP/IP is a bottom-up approa...read more

Asked in Netenrich Technologies

Q. What are the differences between the OSI model and the TCP/IP model?
OSI is a theoretical model with 7 layers, while TCP/IP is a practical implementation with 4 layers.
OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application.
TCP/IP model has 4 layers: Network Interface, Inter...read more

Asked in Cisco

Q. On which layer do routers rely?
Routers operate at the network layer (Layer 3) of the OSI model.
Routers forward data packets between networks based on IP addresses
They make decisions based on routing tables
Routers are essential for connecting different networks together
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