OSI Model

Question 1

What is the OSI Model?

Answer 1

A framework used to understand and standardize how different network protocols interact to enable communication over a network.

Question 2

How many layers are in the OSI Model?

Answer 2

7 (layers of network communication)

Question 3

OSI Layer 1?

Answer 3

PHYSICAL LAYER - Responsible for transmitting raw data bits over physical mediums like cables, fiber optics, or wireless signals. Includes hardware like switches and routers.

Question 4

OSI Layer 2?

Answer 4

DATA LINK LAYER - Makes sure data gets to the right device on the same network. It organizes raw data from Physical Layer into chunks called frames and uses MAC addresses to send them to the right place. It also checks for errors along the way.

Question 5

OSI Layer 3?

Answer 5

NETWORK LAYER - Responsible for routing data between different networks using IP addresses, and determining the best path for data to travel.

It takes the data frames from the Data Link Layer and adds logical addressing such as IP addresses, to help route the data to its destination across various networks.

Question 6

OSI Layer 4?

Answer 6

TRANSPORT LAYER - Ensures reliable data delivery between devices through error checking, data flow control, and retransmission if needed. Protocols like TCP and UDP operate here.

Question 7

OSI Layer 5?

Answer 7

SESSION LAYER - Responsible for managing and controlling interactions between applications.

Manages and controls the opening, closing, and maintenance of communication sessions between two devices on a network. It keeps data streams organized and synchronized.

Question 8

OSI Layer 6?

Answer 8

PRESENTATION LAYER - Ensures that data is presented in a format that the Application Layer can understand.

Translates data between the application and the network, handling data formats, encryption, and compression to ensure it is readable by the receiving system.

Question 9

OSI Layer 7?

Answer 9

APPLICATION LAYER - The layer where users interact with network services and applications such as web browsers, email clients and file transfer programs.

Interacts directly with user applications, providing services like email, web browsing, and file transfers. It enables communication between software and the network.

Question 10

What does OSI Model stand for?

Answer 10

Open Systems Interconnection Model