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

2. What is the process called at the receiving Host?
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
Prepare the data to be sent through the network
Source and Destination IP address
Decapsulation

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.
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Prepare the data to be sent through the network
Source and Destination MAC address

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

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

6. What happens to the PDU at layer 1(Physical)?
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
Converts the frames into bits for transmission across the transmission media
Prepare the data to be sent through the network

7. What is data called after a Header is added?
Decapsulation
Segments
Segment
Source & Destination Ports

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

9. What happens to data at layer 4 (Transport)?
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Prepare the data to be sent through the network

10. What gets added to the service data unit at the Network layer?
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.
Source and Destination 'IP addresses'
Source and Destination IP address

11. What is data called after the Source and Destination 'IP addresses' are added at layer 3 (Network)?
Data
Packet
Decapsulation
Layer 2

12. When moving from top to bottom through the OSI model layers - which comes first - packets or segments?
Segments
Decapsulation
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC 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.

13. What is a PDU (Protocol Data Unit)?
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
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
Decapsulation
It start in the upper layers and works is way down?

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

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

16. In general What are the responsibility of the upper layers?
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.
It start in the upper layers and works is way down?
Segments
Prepare the data to be sent through the network

17. Which OSI model layer uses service data units called frames?
Source and Destination 'IP addresses'
Layer 2
Source and Destination IP address
Segment

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

19. What is the layer 4 (Transport) control information that is added to the Header?
Source & Destination Ports
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
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

20. Where does the process of data encapsulation start?
Source and Destination 'MAC addresses'
Source and Destination MAC address
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.
It start in the upper layers and works is way down?

21. What is Service Data Unit (SDU) comsidered in layers 5 -6 &7?
Data
Frames
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

22. 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
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'
Packet

23. What gets added to the service data unit at the Data Link layer?
Source and Destination IP address
Source and Destination 'MAC addresses'
Source and Destination MAC address
It start in the upper layers and works is way down?

24. What is a MPDU (MAC Protocol Data Unit)?
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Prepare the data to be sent through the network
Source and Destination MAC address
Packet