Here's an example of a packet frame and its header for data transmission. A typical frame header contains several fields, depending on the protocol and network type (like Ethernet). Below is a simplified Ethernet frame structure. Ethernet Frame Header Breakdown: Destination MAC Address (6 bytes): The hardware address of the recipient (e.g., the next router or the destination device). Source MAC Address (6 bytes): The hardware address of the sender (e.g., your computer or router). Type/Length (2 bytes): Type : Indicates the type of the protocol being used (for example, IP, ARP). Length : If using Ethernet II, this field indicates the length of the payload. Payload (Data) (46-1500 bytes): The actual data being transmitted (e.g., your "Hello" message or IP packet). This is what gets encapsulated in the frame. This can vary in size, depending on the network and protocol used. Frame Check Sequence (FCS) (4 bytes): A checksum used for err