STAC (LZS) was developed by STAC Electronics, who then changed their name to Hi/fn, Inc., and is based on the Lempel-Ziv (LZ) compression algorithm. Although effective, the STAC compression algorithm uses more CPU resources to perform compression. Cisco IOS software uses an optimized version of STAC compression. LZS is available in Cisco's Link Access Procedure, Balanced (LAPB), HDLC, X.25, and Frame Relay data compression solutions. FRF.9 and IPComp use the LZS compression algorithm.
The Predictor compression algorithm tries to predict the next sequence of characters in the data stream by using an index to look up a sequence in the compression dictionary. It then examines the next sequence in the data stream to see if it matches. If so, that sequence replaces the looked-up sequence in the dictionary. If not, the algorithm locates the next character sequence in the index and the process begins again. The index updates itself by hashing a few of the most recent character sequences from the input stream. - Rich ----- Original Message ----- From: "Cisco Nuts" To: Sent: Thursday, March 14, 2002 3:38 PM Subject: Stacker and Predictor? [7:38286] > Hello, > Can anyone explain in a simple way (layman's terms) on how Stacker and > Predictor work? > Thank you. > > > > _________________________________________________________________ > Chat with friends online, try MSN Messenger: http://messenger.msn.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=38291&t=38286 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
