@node UsecaseNoLink
+@cindex extreme environments
+@cindex lack of link
@section Extreme terrestrial environments, no link
This is some kind of too slow link. Offline delivery methods is the only
media for transferring packets to other nodes.
Assume that you send two files to @emph{bob} node. Insert USB storage
-device (SD is preferable!), mount it and run @ref{nncp-xfer}:
+device (SD is preferable!), mount it and run @command{@ref{nncp-xfer}}:
@example
$ nncp-xfer -node bob /media/usbstick
@end example
to find all packets related to their node and copy them locally for
-further processing. @command{nncp-xfer} is the only command used with
+further processing. @command{@ref{nncp-xfer}} is the only command used with
removable devices.
+
+You can also optionally wait for explicit packets receipt
+acknowledgement as described in @command{@ref{nncp-ack}}.