Date: Wed, 29 Dec 1999 10:26:31 +0100 From: sthaug@nethelp.no To: justin@apple.com Cc: fgont@softhome.net, freebsd-net@FreeBSD.ORG Subject: Re: Two many CRCs? Message-ID: <79056.946459591@verdi.nethelp.no> In-Reply-To: Your message of "Tue, 28 Dec 1999 18:13:16 -0800" References: <199912290213.SAA01337@walker3.apple.com>
next in thread | previous in thread | raw e-mail | index | archive | help
> So what's really duplicated is the CRC at the media layer and those > at the protocol layers. You can often argue that this isn't duplication - the link layer CRC only covers one hop, while the TCP checksum is end to end. Of course, if you have for instance ATM AAL5, you also have an end to end checksum there. However, there's been research (Craig Partridge & al) which suggests that the AAL5 CRC and the TCP checksum catch *different* classes of errors, and that it's really useful to have both. Steinar Haug, Nethelp consulting, sthaug@nethelp.no To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?79056.946459591>