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The OSI Model. 001 011 0 1 1 0 FTP API 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical HTTP Software.

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Presentation on theme: "The OSI Model. 001 011 0 1 1 0 FTP API 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical HTTP Software."— Presentation transcript:

1 The OSI Model

2 001 011 0 1 1 0 FTP API 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical HTTP Email Software Layer 7: Application

3 10010 00111 HTTP 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical Format Encrypt Compress Translate Layer 6: Presentation

4 Connection Termination Prioritize Layer 5: Session 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical

5 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical Flow control Retransmission Monitor channel Layer 4: Transport Connection Termination Prioritize Flow control Retransmission Monitor channel Flow control Retransmission Monitor channel

6 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical Routing Error detect Layer 3: Network Flow control Retransmission Monitor channel Flow control Retransmission Monitor channel

7 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical F r a m e Layer 2: Data Link

8 7. Application 6. Presentation 5. Session 4. Transport 3. Network 2. Data Link 1. Physical Layer 1: Physical

9 Peering

10 Encapsulation: Apparent Content Data ICMP Header IP Header ??Layer 3?? Layer 3

11 Content Data ICMP Header IP Header Encapsulation: Apparent ??Layer 3?? Layer 3

12 Encapsulation: Actual ICMP Header IP Header Data Segments Info DATA Layer 3

13 Content Data ICMP Header IP Header Data Ethernet CRC Ethernet Header Encapsulation: Actual Layer 2

14 Content Data ICMP Header IP Header Data Ethernet CRC Ethernet Header Content Data ICMP Header IP Header Encapsulation: Actual Layer 2

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