OSI Model

Question 1

What is a clever mnemonic device to help you remember the OSI model?

Answer 1

Please Do Not Teach Students Pointless Acronyms

Question 2

What is the first layer of the OSI model?

Answer 2

Physical Layer

Question 3

What is the second layer of the OSI model?

Answer 3

Data Link Layer

Question 4

What is the third layer of the OSI model?

Answer 4

Network Layer

Question 5

What is the fourth layer of the OSI model?

Answer 5

Transport Layer

Question 6

What is the fifth layer of the OSI model?

Answer 6

Sessions Layer

Question 7

What is the sixth layer of the OSI model?

Answer 7

Presentation Layer

Question 8

What is the seventh layer of the OSI model?

Answer 8

Application Layer

Question 9

What is in the Physical layer?

Answer 9

This layer reflects the electrical and physical representation of the system. This includes things like cable type to radiofrequency. This also includes the layout of pins, voltages, and other physical requirements.

Question 10

What is in the Data Link layer

Answer 10

This layer provides node-to-node data transfers between two directly connected nodes. It defines the protocol to establish and terminate a connection between two physically connected devices. It also defines the protocol for flow control between them.

Question 11

What are the two sublayers of the Data Link layer?

Answer 11

Media Access Control (MAC) and Logical Link Control (LLC)

Question 12

What does the MAC sublayer responsible for??

Answer 12

Controlling how devices in a network gain access to a medium and permission to transmit data.

Question 13

What is the Logical Link Control layer responsible for?

Answer 13

Identifying and encapsulating network layer protocols, and controls error checking and frame synchronization.

Question 14

What divides the Data Link layer into two sublayers?

Answer 14

IEEE 802

Question 15

What Data Link layer protocol in the can operate over several physical layers?

Answer 15

Point-to-Point Protocol (PPP)

Question 16

What layer of the OSI model do most switches operate in?

Answer 16

The Data Link layer

Question 17

What layer of the OSI model are bits located

Answer 17

The Physical Layer

Question 18

What security encryption can be applied in the Data Link layer?

Answer 18

MACSec

Question 19

What is MACSec also known as?

Answer 19

IEEE 802.1AE

Question 20

What does the Network layer provide?

Answer 20

Functional and procedural means of transferring packets from one node to another connected in different networks

Question 21

What does the Transport layer provide?

Answer 21

Functional and procedural means of transferring variable-length data sequences from a source to a destination host while maintaining quality of service functions.

Question 22

What are the three responsibilities of the Session layer?

Answer 22

1. Controlling dialogues (connections) between computers.
2. Provide for full-duplex, half-duplex, or simplex operation.
3. Establish procedures for checkpointing, suspending, restarting, and terminating a session (or gracefully closing one)

Question 23

What is the responsibility of the Presentation layer?

Answer 23

To present data into the form that the application accepts. This layer formats data to be sent across a network

Question 24

What happens in the Application Layer?

Answer 24

Interaction with software applications that implement a communicating component.

Question 25

What OSI layer is closest to the end user?

Answer 25

The Application Layer