unit 4

What is the purpose of the OSI Model?

• To provide a universal set of specifications for computer communication

• To ensure all devices use the same operating system

• To create a single-layer communication system

• To eliminate the need for network protocols

How many layers are there in the OSI Model?

• 7

• 5

• 8

• 6

Which layer of the OSI Model is responsible for error checking?

• Transport Layer

• Data Link Layer

• Network Layer

• Physical Layer

What does the Transport Layer do?

• Formats data for application use

• Establishes user sessions

• Ensures accurate delivery of data

• Routes data to different networks

Which protocol is used at the Application Layer for sending emails?

• HTTP

• FTP

• SMTP

• TCP

What type of address is a MAC address?

• Virtual address

• Physical address

• Network address

• Logical address

What is the main function of the Network Layer?

• To provide error correction

• To route data packets to their destination

• To establish sessions between applications

• To format data for transmission

Which layer is responsible for data encapsulation?

• Data Link Layer

• Physical Layer

• Transport Layer

• Application Layer

What does the Presentation Layer do?

• Translates data formats

• Establishes connections

• Ensures data integrity

• Routes data packets

What is the function of the Session Layer?

• To format data for applications

• To route data packets

• To maintain user connections

• To manage data flow