The provided image is a diagram that visually explains the roles and addressing schemes used by the lower four layers (L1 to L4) of a network model during data communication. Here is a detailed breakdown of each layer shown in the image:
- L4 (Transport Layer):
- A purple line illustrates the logical end-to-end connection between Applications on the source and destination servers.
- It uses TCP/UDP Port numbers to identify the specific application receiving the data, handling “Application Data Transferring.”
- L3 (Network Layer):
- A blue line represents the logical connection from the source host to the destination host across the network.
- It utilizes the IP Address, where intermediate routers perform routing to find the best path to the destination (“Route By Dest IP Address”).
- L2 (Data Link Layer):
- A light blue line demonstrates node-to-node communication between directly connected devices (e.g., a server and a switch).
- It uses the MAC Address for local delivery, ensuring the destination MAC address matches the device’s own hardware address (“MAC Address Matching with my one”).
- L1 (Physical Layer):
- This layer depicts the conversion between digital information and physical transmission mediums.
- It shows how binary data (“01 00 data”) is translated into electrical, light, or radio waveforms (“signal”) and vice versa (“Binary <-> Signal”) over cables or wireless antennas.
📝 Summary
This image is an excellent educational visualization that breaks down how data travels across network devices (servers, switches, routers). It intuitively maps out the specific protocols and addressing systems applied at each level: L1 (Physical Signals) -> L2 (MAC Addresses) -> L3 (IP Addresses) -> L4 (Port Numbers).This image is an excellent educational visualization that breaks down how data travels across network devices (servers, switches, routers). It intuitively maps out the specific protocols and addressing systems applied at each level: L1 (Physical Signals) -> L2 (MAC Addresses) -> L3 (IP Addresses) -> L4 (Port Numbers).
#NetworkLayer #OSIModel #NetworkingBasics #L1toL4 #DataCommunication #TCPIP #ITInfrastructure
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