Discussion on Network Models & Layered Architecture for GRE 2021

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Complete Video at - Computer Network Models & Layered Architecture (Computer Science)


  • Network Model and its Working
  • Different Network Models- OSI and TCP/IP
  • Layered architecture

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Computer Network Model

Computer Network Model

Different Computer Network Models

  • 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.
Computer Network Model

Layered Network Architecture


Q1. OSI Stands for ________


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.


A. 4

B. 3

C. 6

D. 7

Answer: A

Q3. TCP is


  1. Operated at data link layer
  2. Connection oriented and unreliable
  3. Connection oriented and reliable
  4. Connectionless and unreliable

Answer: C

  • We learnt about:

#Computer Network Model

#Layered Architecture

#Working of Layered Architecture

#OSI Model

#TCP/IP Model

  • We learn about other encoding techniques in further videos.

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