5390

5050

كارشناسي ارشد

مخابرات ﴿شبكه﴾

اصفهان: دانشگاه صنعتي اصفهان، دانشكده برق و كامپيوتر

1389

دوازده،123ص.: مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

مسعود رضا هاشمي

حسين سعيدي

23/5/89

مهدي برنجكوب، پژمان خديوي

مهندسي برق و كامپيوتر

ID5050

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Simulation and implementation of IP multicast in the Isfahan University of Technology and improving the security of the IGMP AC access control structure Masoomeh Adhami m adhami@ec iut ac ir Date of Submission 2010 05 26 Department of Electrical and Computer Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree M Sc Language Farsi Supervisors Hashemi masoodreza hashemim@cc iut ac ir Saidi hossein hsaidi@cc iut ac ir Abstract Today along with the development of network applications it became more essential to lessen the band width and for this purpose multi cast service has become more common One kind of connections in computer networks is multicast in which the destination of sent packages is a group of receivers Multicast is a very good network service which delivers data to a group of clients that all are members of a multicast group This service uses the network band width efficiently and is appropriate specially for multimedia cast for a group of clients in network Some of the applications of multicast are video conference internet television and radio Elearning and so on Multicast uses it s own special algorithms to route multicast data Multicast routing algorithms devide to two general group of tree algorithm source based tree algorithm and shared tree algorithem The purpose of multicast routing is to find a tree which includes all routers that have at least one member of group in their subnetworks Different protocols are designed on the basis of these two routing algorithms among which PIM protocol is used in practical implementation of IP multicast because of it s advantages This protocol includes two PIM DM modes operating on the basis of source based tree algorithm and also PIM SM on the basis of shared tree algorithm Although it has advantages the IP multicast model is not widely implemented One of the reasons is the non secure IP multicast service In other words in the classic model of the IP multicast each entity can send information to group and everyone can receive them Open joining and leaving the group service in IP multicast can cause wide attacks that are generally cases of DOS attacks In recent years different solutions have been proposed to remove these problems In this thesis to solve the security problems of IP multicast service models and possible solutions are evaluated and focusing on IGMP AC access control structure a new structure is suggested that compensates the lack of security of this structure and adds new security services to it Then after evaluating different routing protocols and their advantages and disadvantages first by the selection of the most appropriate protocol IP multicast service has been implemented in a simulated network and after a successful simulation test this service has been implemented in Isfahan University of Technology network and the efficiency of the network in the case of some important parameters has been evaluated Keywords IP multicast multicast routing algorithems access control authentication group key

مسعود رضا هاشمي

حسين سعيدي

مهدي برنجكوب، پژمان خديوي