Network Topic 2

What is the primary purpose of the OSI model?

• To create a programming language

• To outline network device interactions

• To manage database connections

• To define hardware specifications

Which layer of the OSI model is responsible for data formatting and encryption?

• Network Layer

• Application Layer

• Transport Layer

• Presentation Layer

Which layer of the OSI model establishes connections between applications?

• Data Link Layer

• Network Layer

• Transport Layer

• Session Layer

Which protocol is used for sending emails?

• SMTP

• HTTP

• POP3

• FTP

What is the role of the Network Layer in the OSI model?

• To format data for the application layer

• To handle addressing and routing of messages

• To manage data flow between sender and receiver

• To perform error detection

Which of the following is NOT a layer in the OSI model?

• Session Layer

• Application Layer

• Network Interface Layer

• Transport Layer

What is a Protocol Data Unit (PDU)?

• A network routing table

• A method of data encryption

• A type of network hardware

• A unit of data specified by a protocol

Which layer of the OSI model is responsible for error control?

• Physical Layer

• Data Link Layer

• Application Layer

• Network Layer

Which of the following is a well-known port number?

• 8080

• 21

• 49152

• 65535

Which layer of the OSI model does the MAC protocol belong to?

• Physical Layer

• Data Link Layer

• Network Layer

• Transport Layer