%0 Journal Article %T Evaluating the Reliability of Communication Networks (WAN) Using Their Fuzzy Fault Tree Analysis - A Case Study %A Rafiee, P. %A Latif Shabgahi, G. %J Journal of Mathematics and Computer Science %D 2011 %V 2 %N 2 %@ ISSN 2008-949X %F Rafiee2011 %X Keeping wide area networks in a reliable mode, and evaluating their reliability is an essential task for network managers. Redundancy in components and communication links in networks is used to provide reliability. In this paper fault tree model is used to evaluate the reliability of an operational network. This analysis is a hierarchical and logical model of undesirable events of the system that is based on all possible combinations of its basic and intermediate events. Since there is often uncertainty in the estimation of failure probability of system components and communication links have been considered as a fuzzy system, and we have evaluated the system fault tree based on indefinite SNMP protocol by means of the fuzzy logic. We have described our methodology by means of a small case study and presented our results. %9 journal article %R 10.22436/jmcs.002.02.06 %U http://dx.doi.org/10.22436/jmcs.002.02.06 %P 262--270 %0 Book %T Design and Analysis of Fault-Tolerant Digital system %A B. W. Johnson %D 1988 %I Addison-Wesley Longman Publishing Co. %C Boston %F Johnson1988 %0 Book %T Fault Tree Handbook %A N. H. Roberts %A W. E. Vesely %D 1987 %I U.S. Nuclear Regulatory Commission %C Washington %F Roberts1987 %0 Book %T CCNP Switch 642-813 %A D. Hucaby %D 2010 %I Cisco Press %C Indianapolis %F Hucaby2010 %0 Book %T Fuzzy sets, fuzzy logic, and fuzzy systems: selected papers by Lotfi A. Zadeh %A G. J. Klir %A B.Yuan %D 1996 %I Scientific Publishing Co. %C River Edge %F Klir1996 %0 Journal Article %T IP performance metrics (IPPM) metrics registry %A E. Stephan %J France Telecom R. & D. %D 2005 %V 2005 %F Stephan2005 %0 Journal Article %T Simple Network Management Protocol (SNMP) over IEEE 802 Networks %A J. Schoenwaelder %A T. Jeffree %J International University Bremen %D 2006 %V 2006 %F Schoenwaelder2006 %0 Journal Article %T Bandwidth constraints models for differentiated services (DiffServ)-aware MPLS traffic engineering: performance evaluation %A W. Lai %J AT&T Labs %D 2005 %V 2005 %F Lai2005 %0 Journal Article %T A one-way packet loss metric for IPPM %A G. Almes %A S. Kalidindi %A M. Zekauskas %J Advanced Network & Services %D 1999 %V 1999 %F Almes1999 %0 Book %T Fuzzy Logic with Engineering Applications %A T. J. Ross %D 2010 %I John Wiley & Sons %C U. K. %F Ross 2010