The World Wide Web has become the standard mechanism for information distribution and scientific collaboration on the Internet. This dissertation research explores a suite of techniques for discovering relevant dynamic sources in a specific domain of interest and for managing Web data effectively. We first explore techniques for discovery and automatic classification of dynamic Web sources. Our approach utilizes a service class model of the dynamic Web that allows the characteristics of interesting services to be specified using a service class description. To promote effective Web data management, the Page Digest Web document encoding eliminates tag redundancy and places structure, content, tags, and attributes into separate containers, each of which can be referenced in isolation or in conjunction with the other elements of the document. The Page Digest Sentinel system leverages our unique encoding to provide efficient and scalable change monitoring for arbitrary Web documents through document compartmentalization and semantic change request grouping. Finally, we present XPack, an XML document compression system that uses a containerized view of an XML document to provide both good compression and efficient querying over compressed documents. XPack's queryable XML compression format is general-purpose, does not rely on domain knowledge or particular document structural characteristics for compression, and achieves better query performance than standard query processors using text-based XML. Our research expands the capabilities of existing dynamic Web techniques, providing superior service discovery and classification services, efficient change monitoring of Web information, and compartmentalized document handling. DynaBot is the first system to combine a service class view of the Web with a modular crawling architecture to provide automated service discovery and classification. The Page Digest Web document encoding represents Web documents efficiently by separating the individual characteristics of the document. The Page Digest Sentinel change monitoring system utilizes the Page Digest document encoding for scalable change monitoring through efficient change algorithms and intelligent request grouping. Finally, XPack is the first XML compression system that delivers compression rates similar to existing techniques while supporting better query performance than standard query processors using text-based XML.

Multicasting in a network improves the efficiency to deliver an IP packet to multiple clients at the same time. Small to medium sized organizations implement this technology to enhance their network capability, which is otherwise not possible just with normal routing. However, to use this technology, it requires proper network design with tidy resource implementation.Network administrators prefer automatic deployment of multicast technology because it reduces the potential risk of prolonged down time during network troubleshooting. On the other hand, choosing an auto deployment technology could cause malfunctioning in the network. To avoid such malfunctioning, we used two technologies: Auto-RP (Auto- Rendezvous Point) [1] and Bootstrap [2] in our network. A problem that occurs here is that if different domains with similar or different technologies want to share their resources with each other, then regular multicasting cannot connect them for successful communication. Also, if an administrator wishes to provide short and redundant paths within a domain, then these two technologies do not possess the ability to do so.The thesis presents issues in intra-domain and inter-domain multicast networks; it also focuses on Auto-RP (Auto Rendezvous Point) and BSR (Bootstrap Router) which are technologies related to multicasting. This project highlights the importance of multicasting security and will brief the problems associated with these two technologies. It will offer a better solution with a properly implemented design guide. The study uses MSDP (Multicast Source Discovery Protocol) [3] which connects two domains with multicasting capabilities for exchanging the source and providing redundancy in intra- domain. The work implements MBGP (Multicast Border Gateway Protocol) [4] to avoid a situation in which there is no multicast support on one of the service provider(s) end. Keywords:Auto-RP (Auto-Rendezvous Point), BSR (Bootstrap Router), MSDP (Multicast Source Discovery Protocol), MBGP (Multicast Border Gateway Protocol)