Bill Cunningham wrote:
APEX core data is referred to as datagrams,
a term denoting the network layer. Surely APEX
core data has to be packeted, even if not framed.
Dave Crocker wrote:
The term 'datagram' does not specify a particular
level in the communications hierarchy.
It is a mode, not a layer
I thought a datagram was at the same layer than a packet, the difference
being what they contain: A packet contains data issued from a
connection-oriented protocol (such as TCP) from the layer above, when a
datagram contains data issued from a connectionless protocol (such as
UDP).
From what Bill wrote I would interpret that APEX is a transport layer
(or possibly above), connectionless protocol.
What am I missing here?
Michel.
If datagram and packet is the same, then what are frames? TCP is carried by
PPP frames. I'm not sure about APEX (rfc 3340)