Test your basic knowledge |

Cisco Certification Data Encapsulation

Instructions:

Answer 24 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. What is the layer 3 (Network) control information that is added to the Header?

2. What happens to data at layer 4 (Transport)?
Layer 2
In a layered system - a unit of data which is specified in a protocol of a given layer and which consists of protocol-control information and possibly user data of that layer
It is a unit of data that has been passed down from an OSI layer to a lower layer and that has not yet been encapsulated into a protocol data unit (PDU) by the lower layer.
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

3. What is a SDU (Service Data Unit)?
It is a unit of data that has been passed down from an OSI layer to a lower layer and that has not yet been encapsulated into a protocol data unit (PDU) by the lower layer.
In a layered system - a unit of data which is specified in a protocol of a given layer and which consists of protocol-control information and possibly user data of that layer
Source and Destination MAC address
Frames

4. What is the layer 4 (Transport) control information that is added to the Header?
Data
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'
Source & Destination Ports
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.

5. What is the short description of the encapsulation process?
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Segments
Converts the frames into bits for transmission across the transmission media
Source and Destination 'IP addresses'

6. What gets added to the service data unit at the Data Link layer?
Source and Destination MAC address
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
It start in the upper layers and works is way down?
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits

7. What is data called after a Header is added?
Segments
Source & Destination Ports
Segment
Source and Destination 'MAC addresses'

8. In general What are the responsibility of the upper layers?
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
It start in the upper layers and works is way down?
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
Prepare the data to be sent through the network

9. What is the process called at the receiving Host?
Source & Destination Ports
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'
Decapsulation
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.

10. Where does the process of data encapsulation start?
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
It start in the upper layers and works is way down?
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
4.The Layer 4 (Transport Layer) PDU is the segment for TCP connections or datagram for UDP connections 'Segment' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 1.The Layer 1 (Physical Layer) PDU i

11. What is a MPDU (MAC Protocol Data Unit)?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Converts the frames into bits for transmission across the transmission media
4.The Layer 4 (Transport Layer) PDU is the segment for TCP connections or datagram for UDP connections 'Segment' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 1.The Layer 1 (Physical Layer) PDU i
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.

12. What is data called after the Source and Destination 'MAC addresses' are added at layer 2 (Data Link)?
It is a unit of data that has been passed down from an OSI layer to a lower layer and that has not yet been encapsulated into a protocol data unit (PDU) by the lower layer.
4.The Layer 4 (Transport Layer) PDU is the segment for TCP connections or datagram for UDP connections 'Segment' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 1.The Layer 1 (Physical Layer) PDU i
Frames
Source and Destination MAC address

13. What is the layer 2 (Data Link) control information that is added to the Header?

14. In an OSI context what happens to a PDU that is being Transmitted?

15. What is a PDU (Protocol Data Unit)?
4.The Layer 4 (Transport Layer) PDU is the segment for TCP connections or datagram for UDP connections 'Segment' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 1.The Layer 1 (Physical Layer) PDU i
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'
It is a unit of data that has been passed down from an OSI layer to a lower layer and that has not yet been encapsulated into a protocol data unit (PDU) by the lower layer.
In a layered system - a unit of data which is specified in a protocol of a given layer and which consists of protocol-control information and possibly user data of that layer

16. When moving from top to bottom through the OSI model layers - which comes first - packets or segments?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
4.The Layer 4 (Transport Layer) PDU is the segment for TCP connections or datagram for UDP connections 'Segment' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 1.The Layer 1 (Physical Layer) PDU i
Source & Destination Ports
Segments

17. What is Service Data Unit (SDU) comsidered in layers 5 -6 &7?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Data
In a layered system - a unit of data which is specified in a protocol of a given layer and which consists of protocol-control information and possibly user data of that layer

18. What is data called after the Source and Destination 'IP addresses' are added at layer 3 (Network)?
4.The Layer 4 (Transport Layer) PDU is the segment for TCP connections or datagram for UDP connections 'Segment' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 1.The Layer 1 (Physical Layer) PDU i
Source & Destination Ports
Decapsulation
Packet

19. What happens to the PDU at layer 1(Physical)?
Converts the frames into bits for transmission across the transmission media
In a layered system - a unit of data which is specified in a protocol of a given layer and which consists of protocol-control information and possibly user data of that layer
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'
Layer 2

20. In an OSI context what happens to a PDU that is being recieved?

21. Which OSI model layer uses service data units called frames?
Converts the frames into bits for transmission across the transmission media
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Layer 2

22. What happens to the PDU at layer 3 (Network)?

23. What gets added to the service data unit at the Network layer?
4.The Layer 4 (Transport Layer) PDU is the segment for TCP connections or datagram for UDP connections 'Segment' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 1.The Layer 1 (Physical Layer) PDU i
Source and Destination IP address
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Prepare the data to be sent through the network

24. What happens to the PDU at layer 2(Data Link)?