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OSI & TCP/IP Packet Encapsulation Laboratory
Onion-skin protocol data unit (PDU) stacking tracer illustrating how user application data is progressively encapsulated into TCP segments, IP packets, and Ethernet frames.
NETWORKS • VISUALIZATIONOSI & TCP/IP Packet Encapsulation Laboratory
NETWORKS • OSI & TCP/IP ARCHITECTUREProtocol Data Unit (PDU) Stacking
Packet Encapsulation & Decapsulation Laboratory
Current Protocol Level:Application Layer (L7)
Progressive Protocol Data Unit (PDU) Wrapper:
Application Layer (L7)Data (Payload)
GET /curriculum/networks HTTP/1.1\r\nHost: idras.edu
Transport Layer (L4)TCP Segment
[TCP Header: SrcPort: 54120 | DstPort: 443 | Seq: 1000 | Flags: PSH,ACK]
Network Layer (L3)IP Packet
[IP Header: Src: 192.168.1.100 | Dst: 10.0.0.1 | Protocol: 6 (TCP) | TTL: 64]
Data Link Layer (L2)Ethernet Frame
[Ethernet Header: DestMAC: 00:1A:2B:3C:4D:5E | SrcMAC: AA:BB:CC:DD:EE:FF | Type: IPv4] ... [FCS/CRC]
Physical Layer (L1)Bits (010110...)
01001111 01101110 00100000 01110100 01101000 01100101 00100000 01110111 01101001 01110010 01100101
Application Layer (L7) Function:
User creates data payload. HTTP/HTTPS request generated in user space.
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