430
SEP 2004
Ver. 1.2
DP-1520P/1820P/1820E
The client generates random sequential numbers initially and sends them to the server. The initial
sequential numbers are synchronized with the clock and increments the counter every 4 msec.
The Server responds with an acknowledgement that increments the initial sequential number by one. The
ACK bit number is also changed to a "1" value. The "SYN" can have and identical "ACK" response for each
packet, thus, the server and the client can establish a connection.
N, Sequential No.=4538970
ACK, ACK No.=4538971
SYN, Sequential No.=1919424000
ACK, ACK No.=1919724001
Server
anasonic
evice
Increments No. sequentia
TCP 3 Handshake General Flowchart
Client