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CNIT 344 Exam 2 Guaranteed A+

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CNIT 344 Exam 2 Guaranteed A+ OSI Layers: ️ 1. Physical 2. Data Link 3. Network 4. Transport 5. Session 6. Presentation 7. Application --- Layer 3 Provides: ️ Globally unique addressing for every node in the network. --- What does Layer 3 convert? ️ ...

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  • September 23, 2024
  • 13
  • 2024/2025
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  • CNIT 344 Exm 2 Guaranteed A+
  • CNIT 344 Exm 2 Guaranteed A+
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CNIT 344 Exam 2 Guaranteed A+


OSI Layers: ✔️

1. Physical

2. Data Link

3. Network

4. Transport

5. Session

6. Presentation

7. Application



---



Layer 3 Provides: ✔️

Globally unique addressing for every node in the network.



---



What does Layer 3 convert? ✔️

Data to Packets.



---



Routable Protocols of Layer 3: ✔️

IP, IPX, AppleTalk.



---

, Layer 3 determines: ✔️

Routes between source and destination networks, analyzing at each hop for end-to-end connectivity.



---



Is Layer 3 reliable? ✔️

No.



---



What does Layer 4 convert? ✔️

Data to Messages or Segments.



---



What is Layer 4 responsible for? ✔️

Ensuring host-to-host integrity of transmission by detecting damaged or lost packets, generating
retransmission requests, and resequencing packets as necessary.



---



Layer 4: Stop and Wait: ✔️

Requires the sender to wait for acknowledgement, achieving error control by discarding corrupted
packets and having the sender resend unacknowledged packets when the timer expires (calculations
done in mod 2).



---



Layer 4: Go-Back-N: ✔️

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