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

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

3. What is the short description of the encapsulation process?
Layer 2
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Source and Destination 'IP addresses'
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'

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

5. What is the layer 4 (Transport) control information that is added to the Header?
Source and Destination 'IP addresses'
Source and Destination IP address
Prepare the data to be sent through the network
Source & Destination Ports

6. What is Service Data Unit (SDU) comsidered in layers 5 -6 &7?
Converts the frames into bits for transmission across the transmission media
Segment
Data
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'

7. What gets added to the service data unit at the Data Link layer?
Packet
Source and Destination MAC address
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 packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'

8. What is a MPDU (MAC Protocol Data Unit)?
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
Data
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Layer 2

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

10. 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.
Prepare the data to be sent through the network
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'

11. In general What are the responsibility of the upper layers?
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'
Packet
It start in the upper layers and works is way down?
Prepare the data to be sent through the network

12. What is the process called at the receiving Host?
Source and Destination MAC address
Decapsulation
Data
Converts the frames into bits for transmission across the transmission media

13. When moving from top to bottom through the OSI model layers - which comes first - packets or segments?
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
Frames
Segments

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

15. What is data called after the Source and Destination 'MAC addresses' are added at layer 2 (Data Link)?
Converts the frames into bits for transmission across the transmission media
Frames
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Segment

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

17. Which OSI model layer uses service data units called frames?
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
Segment
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'

18. What is data called after a Header is added?
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
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
Segment
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

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

20. Where does the process of data encapsulation start?
Converts the frames into bits for transmission across the transmission media
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?
Segments

21. What is data called after the Source and Destination 'IP addresses' are added at layer 3 (Network)?
Converts the frames into bits for transmission across the transmission media
Source & Destination Ports
Packet
Layer 2

22. What happens to data at layer 4 (Transport)?
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'
Decapsulation
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information

23. What happens to the PDU at layer 1(Physical)?
It start in the upper layers and works is way down?
Converts the frames into bits for transmission across the transmission media
Decapsulation
Frames

24. What is a PDU (Protocol Data Unit)?
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 packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
Data
Source & Destination Ports