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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. What gets added to the service data unit at the Data Link layer?
Frames
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Source & Destination Ports
Source and Destination MAC address

2. In general What are the responsibility of the upper layers?
Prepare the data to be sent through the network
Layer 2
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
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

3. What is the layer 4 (Transport) control information that is added to the Header?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Source and Destination IP address
Source & Destination Ports
Layer 2

4. Where does the process of data encapsulation start?
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?
Source and Destination IP 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

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

6. What is a SDU (Service Data Unit)?
Layer 2
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.
Data

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

8. When moving from top to bottom through the OSI model layers - which comes first - packets or segments?
Segments
Converts the frames into bits for transmission across the transmission media
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 and Destination 'IP addresses'

9. What happens to data at layer 4 (Transport)?
Source and Destination 'MAC addresses'
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Frames

10. What is the process called at the receiving Host?
Source and Destination 'MAC addresses'
Decapsulation
Packet
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

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

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

13. What is the short description of the encapsulation process?
Decapsulation
Segments
Prepare the data to be sent through the network
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits

14. What is a MPDU (MAC Protocol Data Unit)?
Segments
Converts the frames into bits for transmission across the transmission media
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Source and Destination 'IP addresses'

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

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

17. 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
Data
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits

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
Packet
Data
Converts the frames into bits for transmission across the transmission media

19. What is data called after a Header is added?
Segment
Source and Destination 'IP addresses'
Data
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

20. What happens to the PDU at layer 1(Physical)?
Data
Converts the frames into bits for transmission across the transmission media
Source and Destination 'IP addresses'
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'

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

22. Which OSI model layer uses service data units called frames?
Layer 2
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
Source and Destination 'IP addresses'
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.

23. What is Service Data Unit (SDU) comsidered in layers 5 -6 &7?
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
Source and Destination IP address
It start in the upper layers and works is way down?
Data

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