Discussion on Network Models & Layered Architecture for Competitive Exams 2021

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Computer Network Model: It is the structure and model or design which is used to perform communication between two networks.
OSI Reference Model
TCP/IP Model
- OSI: It stands for ‘Open System Interconnection’ . It is the general purpose communication model in the computer network earlier days.
  - It is an ‘open source’ structure which means that it can be openly used for any environment and network easily for communication purpose.
  - It is a seven layered structured architecture.
- TCP/IP: It stands for ‘Transmission Control Protocol/Internet Protocol’ .
  - It is a four layered architecture model. Different layer is responsible for different task.
Layered Architecture:
- Various computer network models like OSI, TCP/IP work on the layered architecture, which means that there will be various layers of the model.
- There are different layers of a single model will be responsible for various different work and tasks.

Let us take an example.

In Layered Network Architecture, an entity of layer N uses only services of layer N-1.

Layered Network Architecture

Q1. OSI Stands for ________

Options:

A. Open System Interconnection

B. Open Software Interconnection

C. Open System Internetworking

D. Open Session Interconnection

Answer: A

Q2. TCP/IP is a ________Layered architecture model used in computer network.

Options:

A. 4

B. 3

C. 6

D. 7

Answer: A

Q3. TCP is

Options:

Answer: C

#Computer Network Model

#Layered Architecture

#Working of Layered Architecture

#OSI Model

#TCP/IP Model

✍ Mayank