Service manual

432

SEP 2006

Ver. 1.1

DP-8020E/8020P/8016P

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

lly

TCP 3 Handshake General Flowchart

Client