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Each network device’s interface has a unique MAC address, which is crucial for identifying devices on a local network.
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TCP Header: The Source IP Address is listed before the Destination IP Address.
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Ethernet Header: The Destination MAC Address comes before the Source MAC Address.
Important Note:
- Source and Destination IP Addresses remain unchanged throughout the journey.
- Routers update the Ethernet header, particularly the Source and Destination MAC Addresses, but do not alter the IP header.