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


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

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

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4. What is the process called at the receiving Host?
Source and Destination 'IP addresses'
Segment
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


5. What is a SDU (Service Data Unit)?
Layer 2
Decapsulation
Source & Destination Ports
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.


6. What is Service Data Unit (SDU) comsidered in layers 5 -6 &7?
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.
Data
Decapsulation


7. What is the layer 4 (Transport) control information that is added to the Header?
Source & Destination Ports
Source and Destination MAC address
Packet
Layer 2


8. What is data called after the Source and Destination 'IP addresses' are added at layer 3 (Network)?
Packet
Segments
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Converts the segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the Source and Destination 'IP addresses'


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

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10. What is data called after the Source and Destination 'MAC addresses' are added at layer 2 (Data Link)?
Frames
It start in the upper layers and works is way down?
Source and Destination 'IP addresses'
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information


11. When moving from top to bottom through the OSI model layers - which comes first - packets or segments?
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
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Segments
Segment


12. What is data called after a Header is added?
Prepare the data to be sent through the network
Converts the frames into bits for transmission across the transmission media
Segment
Packet


13. 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 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?
Layer 2


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

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15. Which OSI model layer uses service data units called frames?
Decapsulation
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
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


16. 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'
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'
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.


17. What gets added to the service data unit at the Network layer?
Source and Destination MAC address
Data
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


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

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

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20. In general What are the responsibility of the upper layers?
Segment
Frames
Prepare the data to be sent through the network
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information


21. What gets added to the service data unit at the Data Link layer?
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 MAC address
Data
It start in the upper layers and works is way down?


22. What happens to the PDU at layer 1(Physical)?
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
Prepare the data to be sent through the network
Source & Destination Ports


23. Where does the process of data encapsulation start?
It start in the upper layers and works is way down?
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
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits


24. What is a PDU (Protocol Data Unit)?
It start in the upper layers and works is way down?
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 segments into packets - adding logical network and device addresses i.e. the PDU is encapsulated with the 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'