Net+ 1.1 - OSI Model

Which OSI layer is responsible for logical addressing and routing

Network layer

At which OSI layer does TCP operate

Transport layer

Which of the following is a Layer 2 Device

Switch

Which OSI layer ensures data is presented in a readable format, including encryption and compression?

Presentation layer

Which protocol operates at the Network layer?

IP (Internet Protocol)

Which OSI layer is responsible for establishing, managing, and terminating sessions?

Session layer

Which of the following is an example of a Layer 4 protocol?

TCP (Transmission Control Protocol)

Which OSI layer deals with MAC addresses?

Data Link Layer

Which device primarily operates at Layer 3?

Router

Which OSI layer is responsible for converting bits into electrical signals?

Physical Layer

Which OSI layer uses port numbers to identify applications?

Transport Layer

Which OSI layer is responsible for flow control and segmentation?

Transport Layer

The OSI model has ___ layers.

Seven

The ________________ layer is responsible for end-to-end delivery and error recovery.

Transport

The ________________ layer uses IP addresses for communication.

Network

The ________________ layer is where HTTP and FTP operate.

Application

The ________________ layer converts data into a format suitable for transmission over the network medium.

Physical Layer

he ________________ layer handles encryption and compression.

Presentation

The ________________ layer is responsible for physical addressing using MAC addresses.

Data Link

The ________________ layer deals with bits and signaling.

Physical Layer

A user reports that they can ping an IP address but cannot access a website using its domain name. Which OSI layer is most likely involved?

Application layer

A network technician is troubleshooting a problem where frames are being dropped due to collisions. Which OSI layer should they focus on?

Data Link layer

An administrator is configuring SSL/TLS for secure web traƯic. Which OSI layer is primarily involved?

Presentation layer

A router is misconfigured and cannot forward packets to the correct subnet. Which OSI layer is aƯected?

Network layer

A user complains that a file transfer is very slow, and packet retransmissions are observed. Which OSI layer is responsible for fixing this?

Transport layer

Match the OSI layer to its primary function:

21. Application

22. Presentation

23. Session

24. Transport

25. Network

Functions:

A) Logical addressing and routing

B) Data formatting and encryption

C) End-to-end delivery and segmentation

D) User interface and network services

E) Establishing and managing sessions

21. D) User interface and network services

22. B) Data formatting and encryption

23. E) Establishing and managing sessions

24. C) End-to-end delivery and segmentation

25. A) Logical addressing and routing