Hi Al
FTP uses TCP/IP which guaranties transport error free or the Data is
retransmitted. FTP opens a session to the remote site and closes it when the
entire file has been sent. The receiver should then take the transmitted
file from its temp buffer and move it the its required directory.
TFTP is similar but it is not session based. It uses UDP/IP which means that
there are no-retransmissions on loss/erroneous data. TFTP however places a
checksum on the entire file to ensure successful transfer. The receiver
removes the checksum once the file has been successfully received. Failure
of the transfer will cause the entire transfer to be restarted.
Both methods should provide a reliable file transfer. The most common cause
for problems is when a binary file is transferred in ASCII Mode.
I have no idea what Netview use to transfer files
To do external data verification and if both systems are Unix/Dos systems,
you can use many of the checksum programs such as Solaris "cksum" or even
wrap the file within tar or gzip. "cksum will calculate the file CRC on both
systems, tar does it own checksum.
I hope this helps
Phil
> -----Original Message-----
> From: MENEZES, ALAIN [SMTP:a.menezes@ASLK-CGER.BE]
> Sent: Thursday, 4 March 1999 20:28
> To: NV-L@UCSBVM.ucsb.edu
> Subject: Checksum
>
> Hi,
>
> Is there anyone out there having a checksum algorithm/procedure/script ?
> I'd like a way to check if a download has been done without errors.
>
> Do the following "protocols" garantee faultless download ?
> -> FTP
> -> TFTP
> -> Tivoli Framework SWD (don't know what protocol is used)
>
> Thanks
>
> Al
> ---------------------
> Alain Menezes
> ASLK-CGER Services GIE Tel.: +32 2 228.55.74
> Rue Fossé-aux-Loups, 48 Fax.: +32 2
> 228.83.69
> 1000 Bruxelles Email:
> a.menezes@aslk-cger.be
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