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 process called at the receiving Host?
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
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Decapsulation

2. Where does the process of data encapsulation start?
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.
It start in the upper layers and works is way down?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

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

4. 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
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'
Data

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

6. What gets added to the service data unit at the Network layer?
Source and Destination IP address
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Source and Destination 'MAC addresses'
Packet

7. What happens to the PDU at layer 1(Physical)?
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 frames into bits for transmission across the transmission media
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.
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'

8. In general What are the responsibility of the upper layers?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Segments
Prepare the data to be sent through the network
Source & Destination Ports

9. What is a SDU (Service Data Unit)?
Segment
1.The Layer 1 (Physical Layer) PDU is the bit or - more generally - symbol (can also been seen as 'stream') 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 4.The Layer 4 (Transport Layer) PDU is th
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.
Packet

10. Which OSI model layer uses service data units called frames?
Layer 2
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 start in the upper layers and works is way down?
Packet

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

12. What is the short description of the encapsulation process?
Source and Destination MAC address
Decapsulation
Segments
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits

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

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

15. What is a MPDU (MAC Protocol Data Unit)?
Source and Destination 'IP addresses'
Data
Segments
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.

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

17. What happens to data at layer 4 (Transport)?
It start in the upper layers and works is way down?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Source and Destination MAC address
Converts the frames into bits for transmission across the transmission media

18. What is data called after a Header is added?
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'
Segment
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits

19. What is a PDU (Protocol Data Unit)?
Data
Segment
Source & Destination Ports
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

20. What is data called after the Source and Destination 'MAC addresses' are added at layer 2 (Data Link)?
Frames
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
Source and Destination 'IP addresses'

21. When moving from top to bottom through the OSI model layers - which comes first - packets or segments?
Layer 2
Segments
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
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

22. What gets added to the service data unit at the Data Link layer?
Layer 2
Source and Destination MAC address
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
1.The Layer 1 (Physical Layer) PDU is the bit or - more generally - symbol (can also been seen as 'stream') 2.The Layer 2 (Data Link Layer) PDU is the 'Frame' 3.The Layer 3 (Network Layer) PDU is the 'Packet' 4.The Layer 4 (Transport Layer) PDU is th

23. What is the layer 4 (Transport) control information that is added to the Header?
Source and Destination 'MAC addresses'
Layer 2
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Source & Destination Ports

24. What is data called after the Source and Destination 'IP addresses' are added at layer 3 (Network)?
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'
Packet
Converts the frames into bits for transmission across the transmission media