+to display additional statistics, such as the number of packets tossed
+(that is, which the VJ TCP header decompression code rejected).
+.PP
+The
+.B -r
+flag causes
+.B pppstats
+to display the overall packet compression rate. The rate value is
+between 0 and 1, with 0 meaning that the data is incompressible.
+.PP
+The
+.B -c
+flag is used to specify an alternate display mode that shows
+packet compression statistics: the number of packets and bytes
+uncompressed (that is, before compression or after decompression),
+compressed, and incompressible (packets which did not shrink on
+compression and were transmitted uncompressed), and the recent
+compression rate. This rate reflects the recent performance of the
+compression code rather than the overall rate achieved since
+compression was enabled.