What is the OSI Model

What is the main purpose of the OSI model?

• To define specific network protocols for all communication.

• To provide a theoretical framework for understanding network communication.

• To ensure data encryption and security across networks.

• To manage physical hardware connections between devices.

Which layer of the OSI model is responsible for transmitting raw bits of data across a physical connection?

• Data Link Layer

• Network Layer

• Physical Layer

• Transport Layer

How does TCP primarily differ from UDP in the Transport Layer?

• TCP is faster and simpler, while UDP provides error checking.

• TCP provides reliable, end-to-end communication with error checking, while UDP is simpler and faster without such guarantees.

• TCP is used for routing data frames, while UDP handles physical connections.

• TCP organizes data into frames, while UDP divides data into segments.

When a user sends an HTTP request to a web server, at which layer of the OSI model is the HTTP header initially added to the data?

• Transport Layer

• Network Layer

• Data Link Layer

• Application Layer