
Optimizing Network Performance with Queuing and Compression • Chapter 9 401
Per-Interface Compression (Link Compression)
This technique is used to handle larger packets and higher data rates. It is
applied to the entire data stream to be transported—that is, it compresses
the entire WAN link as if it were one application. The per-interface com-
pression algorithm uses STAC or Predictor to compress the traffic, which
in turn is encapsulated in a link protocol such as PPP or LAPB. This last
step applies error correction and ensures packet sequencing.
Per-interface compression adds delay to the application at each router
hop due to compression and decompression ...