UDP header fields

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It is a 8 octet header which is consisting on four fields:
1. Destination port
2. Source port
3. Length
4. Checksum

 Destination port: The port number of the receiver by which the host entertain the client.

 Source port: The port number of the sender by which sender sends the data.

 Length: The length refers to the total size of the segment which is to transmit over the network.

 Checksum: It is used to detect the error the in the segments. The checksum also use to varify the integraty of the data. It give a delivery report to the sender about successfull sending of the data.

 UDP Psudo header
Psudo header is considered when calculating the checksum. It is used some fields of IP header to trasnmit the error free data.

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