Refer to the exhibit. Host B on subnet Teachers transmits a packet to host D on subnet Students. Which Layer 2 and Layer 3 addresses are contained in the PDUs that are transmitted from host B to the router?

 

Last Updated on November 13, 2023 by InfraExam

Refer to the exhibit. Host B on subnet Teachers transmits a packet to host D on subnet Students. Which Layer 2 and Layer 3 addresses are contained in the PDUs that are transmitted from host B to the router?

CCNA1 v7 - ITNv7 - Final Exam Answers 03
CCNA1 v7 – ITNv7 – Final Exam Answers 03
  • Layer 2 destination address = 00-00-0c-94-36-dd
    Layer 2 source address = 00-00-0c-94-36-bb
    Layer 3 destination address = 172.16.20.200
    Layer 3 source address = 172.16.10.200
  • Layer 2 destination address = 00-00-0c-94-36-ab
    Layer 2 source address = 00-00-0c-94-36-bb
    Layer 3 destination address = 172.16.20.200
    Layer 3 source address = 172.16.100.200
  • Layer 2 destination address = 00-00-0c-94-36-ab
    Layer 2 source address = 00-00-0c-94-36-bb
    Layer 3 destination address = 172.16.20.200
    Layer 3 source address = 172.16.10.200
  • Layer 2 destination address = 00-00-0c-94-36-cd
    Layer 2 source address = 00-00-0c-94-36-bb
    Layer 3 destination address = 172.16.20.99
    Layer 3 source address = 172.16.10.200
Explanation & Hint:

Based on the network diagram provided, when Host B in the subnet Teachers sends a packet to Host D in the subnet Students, the Layer 2 and Layer 3 addresses contained in the Protocol Data Units (PDUs) transmitted from Host B to the router would be:

Layer 3 (Network Layer):

  • Layer 3 Source Address: This would be Host B’s IP address, which is 172.16.10.200.
  • Layer 3 Destination Address: This would be Host D’s IP address, which is 172.16.20.200.

Layer 2 (Data Link Layer):

  • Layer 2 Source Address: This would be Host B’s MAC address, which is 00-00-0c-94-36-bb.
  • Layer 2 Destination Address: This would be the MAC address of the router’s interface on the Teachers subnet, which is 00-00-0c-94-36-ab.

The data packet would be framed with these addresses when Host B transmits to the router because the destination host (Host D) is on a different subnet, so the packet needs to be directed to the router’s interface that Host B is connected to.

The correct addresses for the packet transmission from Host B to the router based on the provided exhibit would be:

  • Layer 2 destination address = 00-00-0c-94-36-ab
  • Layer 2 source address = 00-00-0c-94-36-bb
  • Layer 3 destination address = 172.16.20.200
  • Layer 3 source address = 172.16.10.200

For more Questions and Answers:

CCNA 1 v7 – ITN v7.02 – ITNv7 – Final Exam Answers Full 100%

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