which three fields are used in a udp segment header? (choose three.)
The UDP protocol header consists of 8 bytes of Protocol Control Information (PCI) The UDP header consists of four fields each of 2 bytes in length: Source Port (UDP packets from a client use this as a service access point (SAP) to indicate the session on the local client that originated the packet.
Window: 16 bits The number of data octets beginning with the one indicated in the acknowledgment field which the sender of this segment is willing to accept. Checksum: 16 bits The checksum field is the 16 bit one's complement of the one's complement sum of all 16 bit words in the header and text. If a segment contains an odd number of header and text octets to be checksummed, the last octet is padded on the right with zeros to form a 16 bit word for checksum purposes.