On Sun, May 16, 2004 at 06:26:40PM -0400, Michael Richardson wrote:
> LINKTYPE enumeration. - metadata about linktype in file.
>   MUST put a meta-data packet about a particular link type before you
>   use that LINKTYPE.
> 
> - - string saying name.

Is the name one thing assigned to it when a new link-layer type is
registered?

Or is it purely intended for human use, so that the name can be
different in different captures of the same type?

> - - offset to IP header?

What if it's variable?

> - - framing type. (SNAP)

What if it's variable?  (For example:

        link layers with 802.2 headers might use the DSAP to indicate
        OSI traffic and a SNAP header for IP traffic - or might even use
        the DSAP for IP traffic, although I don't know whether anybody
        does that in practice; IPX has either 3 or 4 different ways it's
        encapsulated on Ethernet;

        ATM - what if you have both "classical IP" and LANE traffic?)
-
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