308
UF-9000
APR 2006
Ver. 3.0
DP-180/190
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.
SYN, Sequential No.=4538970
ACK, ACK No.=4538971
SYN, Sequential No.=1919424000
ACK, ACK No.=1919724001
Server
Panasonic
Device
Increments No. sequentially
TCP 3 Handshake General Flowchart
Client
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