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

2. What is a MPDU (MAC Protocol Data Unit)?
Source & Destination Ports
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'
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.

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

4. What is the short description of the encapsulation process?
Source and Destination IP address
Upper layers--data - Transport layer--segments - Network layer--packets containing logical addresses - Data Link layer--framing that adds physical addresses - Physical layer--bits
Decapsulation
Source and Destination 'MAC addresses'

5. 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'
Segments
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

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

7. What happens to data at layer 4 (Transport)?
Data
1st level of encapsulation - breaks the data into pieces called segments - adding sequencing and control information
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
Layer 2

8. 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.
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 MAC address
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

9. Where does the process of data encapsulation start?
It start in the upper layers and works is way down?
A message (Protocol data unit) exchanged between MAC entities in a communication system based on the layered OSI model.
Frames
Source & Destination Ports

10. What is Service Data Unit (SDU) comsidered in layers 5 -6 &7?
Data
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'
Source and Destination MAC address

11. What gets added to the service data unit at the Data Link layer?
Prepare the data to be sent through the network
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
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 MAC address

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

13. What is data called after a Header is added?
Decapsulation
Segment
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

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

15. 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
Segment
It start in the upper layers and works is way down?

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

17. What is data called after the Source and Destination 'IP addresses' are added at layer 3 (Network)?
Packet
Source and Destination IP address
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

18. What gets added to the service data unit at the Network layer?
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
Layer 2
Source and Destination IP address
Prepare the data to be sent through the network

19. What happens to the PDU at layer 1(Physical)?
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 frames into bits for transmission across the transmission media
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

20. 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
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
Converts the packets into frames - adding physical device addressing information i.e.the PDU is encapsulated with the Source and Destination 'MAC addresses'
Layer 2

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

22. In general What are the responsibility of the upper layers?
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
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.
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

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

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