I am running SQL NET trace, handshake is not completing , see some info from the trace

[10-JAN-2013 16:02:08:269] nttcon: set TCP_NODELAY on 608
[10-JAN-2013 16:02:08:269] nsopen: transport is open
[10-JAN-2013 16:02:08:269] nsnainit: inf->nsinfflg[0]: 0x41 inf->nsinfflg[1]: 0x41
[10-JAN-2013 16:02:08:269] nsopen: global context check-in (to slot 0) complete
[10-JAN-2013 16:02:08:269] nscon: doing connect handshake...
[10-JAN-2013 16:02:08:269] nscon: sending NSPTCN packet
[10-JAN-2013 16:02:08:269] nscon: sending 239 bytes connect data
[10-JAN-2013 16:02:08:269] nsdo: 239 bytes to NS buffer