Payload
Source port identifies the sending port.
Dst Port
Destination port identifies the receiving port.
Seq number
If the SYN flag is present, this is the initial sequence number and the first
data byte is the sequence number plus 1.
If the SYN flag is not present, then the first data byte is the sequence
number.
The Auto increment check box may be selected in order for the Sequence
number to follow the number of data bytes sent (Remark: the first data byte
will be number zero in this mode, and not the number entered into the Seq
number field).
Ack number
If the ACK flag is set then the value of this field is the sequence number that
the sender of the acknowledgment expects next.
Data offset
Data offset specifies the size of the TCP header in 32-bit words. This is set
automatically.
Reserved
Reserved for future use and should be set to zero.
Flags
Contains 8 bit flags (control bits). The flags may be programmed individually,
however when Automatic TCP connect is enabled, most of the flags are
controlled by the TCP state engine.
Window
Specifies the size of the sliding window (i.e. the maximum receiver buffer).
The window defines the number of bytes that may be sent before waiting for
an acknowledgement from the receiver.
Checksum
The 16-bit checksum field is used for error-checking of the header and data.
Urgent pointer
If the URG flag is set then this 16-bit field is an offset from the sequence
number indicating the last urgent data byte.
The Payload layer allows you to set the pattern of the Payload of the
transmitted frames.
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