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Cisco Certification Data Encapsulation

Instructions:

Answer 24 questions in 15 minutes.
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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 2 (Data Link) control information that is added to the Header?

2. What happens to the PDU at layer 1(Physical)?
Frames
Segments
Converts the frames into bits for transmission across the transmission media
Packet

3. What happens to data at layer 4 (Transport)?
Decapsulation
It start in the upper layers and works is way down?
Segment
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

4. What is Service Data Unit (SDU) comsidered in layers 5 -6 &7?
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.
Source and Destination IP address
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. 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
Prepare the data to be sent through the network
Source & Destination Ports
Layer 2

6. What is data called after the Source and Destination 'MAC addresses' are added at layer 2 (Data Link)?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
Frames
Source and Destination 'IP addresses'

7. Which OSI model layer uses service data units called frames?
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Layer 2
Segment

8. In general What are the responsibility of the upper layers?
Source and Destination IP address
Packet
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 data called after the Source and Destination 'IP addresses' are added at layer 3 (Network)?
Segment
Segments
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Packet

10. What gets added to the service data unit at the Network layer?
Source and Destination 'MAC addresses'
Prepare the data to be sent through the network
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
Source and Destination IP address

11. When moving from top to bottom through the OSI model layers - which comes first - packets or segments?
Segments
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
Converts the frames into bits for transmission across the transmission media
Source & Destination Ports

12. What is a PDU (Protocol Data Unit)?
Packet
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
Source and Destination 'MAC addresses'

13. What is a SDU (Service Data Unit)?
Source & Destination Ports
It start in the upper layers and works is way down?
Frames
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.

14. What is a MPDU (MAC Protocol Data Unit)?
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'
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.
Layer 2

15. What is data called after a Header is added?
Converts the frames into bits for transmission across the transmission media
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'
Segment

16. 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
Decapsulation
Data
Segment

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

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

19. Where does the process of data encapsulation start?
It start in the upper layers and works is way down?
Source & Destination Ports
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
Layer 2

20. What gets added to the service data unit at the Data Link layer?
Source and Destination MAC address
Decapsulation
It start in the upper layers and works is way down?
Source & Destination Ports

21. What is the layer 4 (Transport) control information that is added to the Header?
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Source & Destination Ports
Source and Destination 'IP addresses'
Converts the frames into bits for transmission across the transmission media

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

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

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