Chapter 3 Network Protocols and Communications

Question 1

What is the Layers of the OSI Model

3. 2.4.4
4. 2.4.1

Answer 1

7. Application
8. Presentation
9. Session
10. Transport
11. Network
12. Data Link Layer
13. Physical Layer

Question 2

What is the TCP/IP Model

3.2.4.4

Answer 2

4. Application Layer
5. Transport
6. Internet
7. Network Layer

Question 3

What is the protocol data unit (PDU) for the Physical Layer?

3.3.1.2

Answer 3

Bits - A Physical layer PDU used when physically transmitting data over the medium

Question 4

What is the protocol data unit (PDU) for the data Link Layer?
3.3.1.2

Answer 4

Frame – Data Link access layer PDU

Question 5

What is the protocol data unit (PDU) for the Network Layer?

3.3.1.2

Answer 5

Packet - Network layer PDU

Question 6

What is the protocol data unit (PDU) for the Transport Layer?
3.3.1.2

Answer 6

Segment - Transport layer PDU

Question 7

What is the protocol data unit (PDU) for the Application Layer?
3.3.1.2

Answer 7

Data - The general term for the PDU used at the application layer

Question 8

What order is the Encapsulation process

3.3.1.3

Answer 8

1) Data - User
2) Segment - Transport
3) Packet - IP
4) Frame - Ethernet

Question 9

What is a physical address?

Answer 9

A Physical address is a 48-bit flat address burned into the ROM of the NIC card which is a Layer1 device of the OSI model. This is divided into 24-bit vendor code and 24-bit serial address

Question 10

What is a Logical Address?

Answer 10

A Logical address is a 32- bit address assigned to each system in a network. This works in Layer-3 of OSI Model. This would be generally the IP address.