Tcp Packet - 3Com MSR 50 Series Configuration Manual

More fragment bit: 0 indicates the packet is the last or only fragment, and 1
■
indicates there are more fragments after this one.
Therefore, if the three-bit Flag is 001, it means the datagram can be fragmented; if
the three-bit Flag is 000, it means this is the last fragment of IP datagram.

TCP Packet

TCP packet format
See Figure 478
Figure 478 TCP packet format
See the following table for the description of the 6 flag bits in the TCP header.
Description on the 6 flag bits in the TCP header
Flag bit
URG
ACK
PSH
RST
SYN
FIN
TCP state transition
See Figure 479
for the TCP packet format.
Remarks
Urgent pointer is valid.
Acknowledgment is valid.
Request to send packet to application layer as soon as possible.
Reset the connection.
Synchronous sequence numbers to initiate a connection.
Terminate a connection when data transmission is finished.
for TCP state transition.
DAR Overview 1699