Top 50 OSI Model Interview Questions and Answers

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 (ISO) in 1984.

• The model helps in understanding how different network protocols and technologies interact with each other.

• The seven layers of the OSI Model are: Physical, Data Link, Network, Transport, Session, Presentation, and Appli...read more

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 data is transmitted while TCP model is used for actual data transmission

• OSI model layers include physical, data link, network, transport, session, presentation, and application

• TCP model layers include network, transport, session,...read more

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 conceptual framework that divides network communication into seven layers.

• TCP/IP is based on a four-layer model, which includes the application, transport, internet, and network access layers.

• The OSI model includes the physical, data li...read more

OSI model devices are specific to each layer of the model, facilitating communication between devices.

• Layer 1 (Physical): hubs, repeaters, cables

• Layer 2 (Data Link): switches, bridges

• Layer 3 (Network): routers, layer 3 switches

• Layer 4 (Transport): gateways, firewalls

• Layer 5 (Session): not applicable

• Layer 6 (Presentation): encryption/decryption devices

• Layer 7 (Application): servers, workstations

OSI and TCP models are networking models used to standardize communication between devices on a network.

• 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 and designing networks while TCP model is used for actual communication

• Examples of layers in OSI model: Physical, Data Link, Network, Transport, Session, Presentation, Application

• Examples of layers in TCP model: Network In...read more

OSI model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has a specific function and communicates with the adjacent layers.

• Subnetting is the process of dividing a network into smaller subnetworks to improve performance and security.

• Subnetting is done by borrowing bits from the host ...read more

The OSI model has 7 layers. OSI or TCP/UDP depends on the application. OSI is used for theoretical understanding while TCP/UDP is used for practical implementation.

• The 7 layers of OSI model are Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• OSI model is used for theoretical understanding of networking concepts.

• TCP/UDP are used for practical implementation of networking protocols.

• TCP is used for reliable data transfer while UDP is used for fast...read more

OSI model has 7 layers. Troubleshooting involves identifying and resolving issues at each layer.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Troubleshooting involves identifying and resolving issues at each layer.

• For example, if there is a connectivity issue, it could be at the Physical layer (cable issue), Network layer (routing issue), or Transport layer (firewall blocking traffic).

• Understanding the OSI model helps ...read more

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 dedicated bandwidth.

• Examples of switches include Ethernet switches and VLAN switches.

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 Link): Manages data transfer between devices on the same network. Example: MAC addresses.

• Layer 3 (Network): Handles routing and forwarding of data packets. Example: IP addresses.

• Layer 4 (Transport): Ensures reliable data transfer bet...read more

Yes, I am familiar with OSI model, MPLS links, etc.

• I have a strong understanding of the OSI model and its seven layers

• I am experienced in configuring and troubleshooting MPLS links

• I have worked with various networking protocols and technologies related to OSI and MPLS

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-encapsulated at each layer

• Examples of protocols at each layer include HTTP, TCP, and Ethernet

A VLAN is a logical grouping of network devices that share the same broadcast domain. OSI model has 7 layers.

• VLAN separates broadcast domains in a switched network

• It allows network administrators to group hosts together based on their functions

• Each VLAN has a unique ID and can span multiple switches

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application

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 network layer of the OSI model.

• Ping can be used to troubleshoot network issues such as high latency or packet loss.

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 devices to share resources and information

• Satellite communication uses satellites to transmit signals over long distances

• Satellite communication is used for TV broadcasting, GPS, and internet access in remote areas

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, Session, Presentation, and Application.

• Each layer has a specific function and communicates with the adjacent layers.

• The Physical layer deals with the physical transmission of data.

• The Data Link layer provides error-free transfer of dat...read more

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.

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 layered approach to network communication.

• It has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has a specific function and communicates with adjacent layers.

• Example: HTTP (Ap...read more

A communication system consists of various components that work together to transmit and receive information. The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.

• A communication system typically consists of a transmitter, receiver, channel, and noise source.

• The transmitter processes the input signal and converts it into a form suitable for transmission through the channel.

• The receiver then receiv...read more

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.

• Each layer communicates with the adjacent layers to provide a seamless flow of data.

• Examples of OSI layers include Physical Layer, Data Link Layer, Network Layer, Transport Layer, etc.

VLANs are logical partitions of a network, while OSI model is a conceptual framework for network communication.

• VLANs allow for network segmentation and improved security

• OSI model has 7 layers, each with a specific function in network communication

• VLANs operate at layer 2 of the OSI model

• OSI model helps in troubleshooting network issues by identifying the layer at which the problem is occurring

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 environment.

• Planning layer involves decision-making algorithms to plan the vehicle's trajectory.

• Control layer involves algorithms to control the vehicle's motion.

• Actuation layer involves actuators to execute the control commands....read more

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 Network layer

• Segments are converted into bits at the Data Link layer

• Bits are transmitted physically through the network at the Physical layer

OSI model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system. Transport layer is responsible for end-to-end communication between applications.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Transport layer provides reliable and sequential delivery of data between end systems.

• It ensures error-free data transmission, flow control, and congestion...read more

OSI model is a conceptual model that characterizes and standardizes the communication functions of a telecommunication or computing system. APIPA is a Microsoft Windows operating system feature that assigns a unique IP address to a computer when DHCP servers are not available.

• OSI model has 7 layers that define how data is transmitted over a network

• APIPA stands for Automatic Private IP Addressing

• APIPA assigns a unique IP address in the range of 169.254.0.1 to 169.254.255.254

• AP...read more

The OSI model consists of 7 layers, each with specific functions. Various types of attacks can target each layer.

• Layer 1 - Physical layer: Deals with physical connections and hardware. Attacks include wiretapping and electromagnetic interference.

• Layer 2 - Data link layer: Manages data transfer between devices on the same network. Attacks include MAC address spoofing and ARP spoofing.

• Layer 3 - Network layer: Handles routing and logical addressing. Attacks include IP spoofing a...read more

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 2 - Data link layer: Manages data transfer between devices on the same network. Example: MAC addresses

• Layer 3 - Network layer: Handles routing and forwarding of data packets. Example: IP addresses

• Layer 4 - Transport layer: Ensure...read more

Common ports and OSI model are important networking concepts.

• Common ports include HTTP (80), HTTPS (443), FTP (21), SSH (22), and Telnet (23).

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has a specific function and communicates with adjacent layers.

• Understanding these concepts is important for network troubleshooting and security.

TCP/IP stack is a set of protocols used for communication over the internet, while OSI Model is a conceptual framework for understanding network communication.

• TCP/IP stack is a practical implementation of networking protocols used for communication over the internet.

• It consists of four layers: Application, Transport, Internet, and Link.

• Each layer has its own set of protocols and functions, such as HTTP, TCP, IP, and Ethernet.

• OSI Model, on the other hand, is a theoretical fram...read more

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 Link, Network, Transport, Session, Presentation, and Application.

• Each layer has specific functions and communicates with the corresponding layer on the receiving end.

• Examples of protocols at different layers include Ethernet at the D...read more

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, Transport, Session, Presentation, and Application.

• TCP/IP has 4 layers: Network Interface, Internet, Transport, and Application.

• OSI is a theoretical model while TCP/IP is a practical model used in the internet.

• TCP/IP is more wide...read more

Explanation of HSRP versions 1 and 2 and OSI model with port numbers and applications at each layer.

• HSRP version 1 uses multicast address 224.0.0.2 and has a default priority of 100.

• HSRP version 2 uses multicast address 224.0.0.102 and has a default priority of 120.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Physical layer uses port numbers 1-1023 and includes devices such as cables and hubs.

• Transport layer uses port...read more

PSTN is a traditional telephone network that uses copper wires to transmit analog voice data.

• PSTN stands for Public Switched Telephone Network

• It is a circuit-switched network that uses analog signals

• It is being replaced by digital networks like VoIP

• Examples of PSTN services include landline phones and fax machines

Networking protocol is a set of rules that governs the communication between devices. OSI model is a conceptual framework for network communication.

• Networking protocol defines how data is transmitted over a network.

• OSI model has 7 layers, each with a specific function in network communication.

• Examples of networking protocols include TCP/IP, HTTP, FTP, and SMTP.

• The OSI model layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

The OSI model is a conceptual framework that defines the functions of a network into seven layers.

• The OSI model stands for Open Systems Interconnection model.

• It was developed by the International Organization for Standardization (ISO) in 1984.

• The model helps in understanding how network protocols and technologies interact with each other.

• The seven layers of the OSI model are: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has its ow...read more

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 approach

• OSI is more complex and comprehensive than TCP/IP

• TCP/IP is the most widely used model in practice

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 widely used and simpler than OSI.

• TCP/IP is used in HTTP, FTP, and SMTP protocols.

• OSI is used in X.25 and ISDN protocols.

Firewall works as a barrier between internal and external networks. OSI layer is a model for network communication.

• Firewall filters incoming and outgoing traffic based on predefined rules.

• OSI layer has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application.

• Each layer has its own set of protocols and functions.

• Firewalls operate at the network and transport layers of the OSI model.

• Firewalls can be hardware or software-based.

• OSI layer helps in ...read more

The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.

• The OSI model stands for Open Systems Interconnection model

• It consists of seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application

• Each layer has specific functions and communicates with the adjacent layers

• The Application layer is the top layer and is responsible for providing network services to user applicat...read more

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 transmission of data between devices.

• IP is responsible for routing data packets between networks.

• TCP/IP works in the transport and network layers of the OSI model.

• It provides end-to-end connectivity and error-free data transmission.

• Examples...read more

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, Session, Presentation, and Application.

• Each layer has a specific function and communicates with the adjacent layers.

• Example: Physical layer deals with the physical transmission of data, while the Application layer deals with user interface...read more

The OSI TCP/IP model is a conceptual framework used to understand how data is transmitted over a network.

• The OSI model has 7 layers, each with specific functions and protocols.

• The TCP/IP model combines the OSI model's top 4 layers into a single layer.

• Examples of protocols in the TCP/IP model include TCP, IP, UDP, and ICMP.

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, Internet, Transport, Application.

• OSI model is a theoretical framework, while TCP/IP model is the actual suite of protocols used for internet communication.

• TCP/IP is more widely used in practice compared to OSI model.

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 packet inspection to detect and block malicious traffic

• Examples of firewall software include Cisco ASA, pfSense, and Windows Firewall

OSI (Open Systems Interconnection) and TCP/IP (Transmission Control Protocol/Internet Protocol) are both networking models used to facilitate communication between devices on a network.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application

• TCP/IP model has 4 layers: Network Interface, Internet, Transport, Application

• OSI model is theoretical while TCP/IP model is practical and widely used in the internet

• Examples of protocols in OSI m...read more

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 layer: Responsible for node-to-node communication and error detection.

• Layer 3 - Network layer: Manages routing and forwarding of data packets.

• Layer 4 - Transport layer: Ensures end-to-end communication and error recovery.

• Layer 5 -...read more

OSI Model and TCP/IP Model are networking models used to understand how data is transmitted over a network.

• OSI Model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application.

• TCP/IP Model has 4 layers: Network Interface, Internet, Transport, Application.

• OSI Model is theoretical while TCP/IP Model is practical and widely used.

• OSI Model helps in understanding the functions of each layer in networking.

• TCP/IP Model is the foundation of the internet...read more

The OSI Model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven layers.

• OSI Model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application

• TCP/IP Model has 4 layers: Network Interface, Internet, Transport, Application

• OSI Model is a theoretical model, while TCP/IP is a practical implementation

• OSI Model is more detailed and structured, while TCP/IP is simpler and more widely used in pra...read more

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

The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven different layers. The TCP/IP model is a concise version of the OSI model, with four layers.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application

• TCP/IP model has 4 layers: Network Interface, Internet, Transport, Application

• OSI model is a theoretical model, while TCP/IP model is a practical implementation

• OSI ...read more

TCP/IP is a set of protocols used for communication between devices on the internet. OSI model is a conceptual framework for network communication.

• TCP/IP stands for Transmission Control Protocol/Internet Protocol

• It is a set of protocols that govern communication between devices on the internet

• TCP is responsible for ensuring reliable transmission of data while IP is responsible for routing the data to its destination

• OSI model stands for Open Systems Interconnection model

• It is ...read more

Lan card works on the Data Link layer of the OSI model.

• Lan card operates at Layer 2 of the OSI model, which is the Data Link layer.

• It is responsible for the physical addressing of devices on the network.

• Examples of Lan cards include Ethernet cards and wireless network adapters.

OSI has 7 layers while TCP/IP has 4 layers.

• OSI model is theoretical while TCP/IP is practical

• OSI has a dedicated session layer while TCP/IP does not

• TCP/IP combines the presentation and session layers into one

• OSI is more complex and rarely used in practice

• TCP/IP is the standard for internet communication

TCP is a transport layer protocol while OSI model is a conceptual framework for understanding network communication.

• TCP is a specific protocol used for transmitting data reliably over a network.

• OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers.

• TCP operates at the transport layer (Layer 4) of the OSI model.

• OSI model includes layers such as physical, data link, network, transport, session...read more

The OSI model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven different layers. TCP/IP is a protocol suite that is used for communication over the internet.

• OSI model has 7 layers: Physical, Data Link, Network, Transport, Session, Presentation, Application

• TCP/IP is a protocol suite that includes TCP (Transmission Control Protocol) and IP (Internet Protocol)

• TCP/IP is used for communication over the internet, while ...read more