From mboxrd@z Thu Jan 1 00:00:00 1970 From: Bill Vodall WA7NWP Subject: Re: YAPP File Transfer with Linux Date: Tue, 12 Jul 2005 12:11:50 -0700 Message-ID: <42D415F6.6040400@jnos.org> References: Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: linux-hams-owner@vger.kernel.org List-Id: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: linux-hams@vger.kernel.org Jeremy Utley wrote: > On 7/12/05, Robert Eliassen wrote: > >>Is TCP/IP often (always?) encapsulated in NetROM or similar protocols over >>AX.25, or is it possible (implemented somewhere) to send IP-packets right in >>AX.25's payload? The routing has to be figured out some way... > > >>>From what I remember, both are possible. TCP/IP can be encapsulated > into the payload of an AX.25 frame, or it can also be a part of netrom > communication. That's correct. With TCP/IP on packet, 40 of the 256 bytes are overhead. Putting it on Netrom adds another 20 bytes. The real killer is that all the ACK packets have the same (40 or 60 bytes) of overhead. Bytes? What are bytes these days? Time to download another 2.4 GB file off the Tivo. Bill