Computer Science – Types and methods of data transmission | e-Consult
Types and methods of data transmission (1 questions)
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The header of a data packet is essential for network routing and control. It contains information that allows network devices (like routers) to understand where the packet is coming from and where it needs to go. Typical information in the header includes:
- Source IP Address: Identifies the sender of the packet.
- Destination IP Address: Identifies the intended recipient.
- Protocol (e.g., TCP, UDP): Specifies the protocol used for communication.
- Sequence Number (TCP): Helps in reassembling data in the correct order.
- Checksum: Used for error detection during transmission.
The trailer primarily focuses on error detection. It typically contains a Cyclic Redundancy Check (CRC). A CRC is a mathematical calculation performed on the packet data that generates a checksum value. The receiver performs the same calculation and compares the generated checksum with the checksum in the trailer. If they don't match, it indicates that errors occurred during transmission, and the packet may be discarded or retransmitted.