Peer-to-Peer Networks & JXTA by Madhurasmitha Chakravarthy & Priti Sabadra

Scope of Presentation Introduction to P2P P2P & Client-Server Model P2P - Function & Types Advantages & Disadvantages Where is it today

Introduction to P2P How many have used Napster*? How many are using Kazaa*? What is P2P?

P2P & Client-Server Model How different from Client-server Model? Re-structuring Required? - NO

Function & Types Every Peer has an additional functional Layer to support Server type responses Pure – No Central Server Hybrid – Central Server (Some required functions)

Advantages & Disadvantages Enhanced load balancing Dynamic information repositories Information Availability Redundancy and fault tolerance Improved Searches

Advantages & Disadvantages (Cont’d) Spurious content, poor connections Traffic redistribution Free riders Cracker heaven

Where is it Today ? Two P2P Applications need to communicate Tough – as each P2P has its own Plug-ins etc Using a common set of services that provide functionality & interoperability - Middleware

Project JXTA (Juxtapose)

Agenda Why JXTA? JXTA ’ s Goals JXTA Architecture JXTA Protocol JXTA Security Different Technologies Advantages of JXTA JXTA Services and Applications

Why JXTA Computing silos – non-interoperable, fragmented networks PC-to-PC – built-in dependencies on PC properties TCP/IP only – built-in dependency on IP-based transport

JXTA ’ s Goals Interoperability – Across different P2P systems and communities Platform independence – Programming languages, system platforms, and networking platforms Ubiquity – Every device with a digital heartbeat

JXTA Architecture

JXTA Architecture (Cont ’ d)  JXTA Core layer:This provides the basic classes or methods that are necessary to develop a p2p application.  JXTA Service Layer :This layer includes some services that may be used by the peers for some specific applications layer.  JXTA Applications layer:These are the P2P applications, which are built using the core and service layer features.

JXTA Protocol  Peer Discovery Protocol  Peer Resolver Protocol  Peer Information Protocol  Peer Membership Protocol  Pipe Binding Protocol  Endpoint Routing Protocol

JXTA Security Transport layer Security(TLS) End-to-end transport independence of JXTA protocols X509.V3 Digital certificates and certificate authorities

Other Technologies Microsoft.Net Groove Technology

Advantages of JXTA  JXTA doesn ’ t need any specific language or Operating System.  JXTA does not need knowledge of network topology.  JXTA can be implemented using C, C++, Java, and Perl.  JXTA can be implemented on top of TCP/IP, HTTP,Blue tooth, HOME PNA and many other protocols.

JXTA Services and Application  Collaboration tools  Distributed searching and indexing  File sharing  Distributed storage & content delivery  Peer-to-peer messaging  Peer monitoring and metering  JXTA Shell

Any

Thank You