TCP Header CLink Layer Header) (P Header) Ports are associated Source port Destination port with OS processes Sequence number Acknowledgment IP source destination addresses plus TCP HdrLen o Flags Advertised window source and destination ports uniquely identifies Checksum Urgent pointer a tcP connection Options(variable) Data 42TCP Header Ports are associated with OS processes IP source & destination addresses plus TCP source and destination ports uniquely identifies a TCP connection Source port Destination port Sequence number Acknowledgment HdrLen 0 Flags Advertised window Checksum Urgent pointer Options (variable) Data (IP Header) (Link Layer Header) 42