-----Original Message----- From: owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] On Behalf Of John Wilson Sent: 13 December 2012 19:30 To: hecnet at Update.UU.SE Subject: Re: [HECnet] VCF-East on HECnet? From: "Rob Jarratt" <robert.jarratt at ntlworld.com> No. It uses a TCP connection. Each buffer received from the device driver is sent along on the TCP connection with a 2-byte length prefix, and that is it. So no DDCMP underneath. OK cool. Little-endian? Big endian, I use htons() to prepare the length for network transmission. [Paul Koning] If you want to really make your head spin, imagine DMP/DMV emulation (DDCMP multipoint). I've never really understood this. Is it a broadcast net, or what? I'm pretty sure I have a pair of DMVs in this mess somewhere... John Wilson D Bit