These thesis groups deal with the examination of Access Control Lists (ACLs) that are used in IP routers mainly for providing network admission control and maintaining a certain level of quality of service. The first thesis group presents a heuristic optimization of the rule entries of the ACLs according to the router traffic. I propose here an idea and a heuristic to solve an NP-hard problem, ...

Current speech-act based ACLs specify domain-independent information about communication and relegate domain-dependent information to an unspecified content language. This is reasonable, but the ACLs cover only a small fraction of the domain-independent information possible. As a key element of modern ACLs, the set of communicative acts needs to be as complete as possible to enable agents to co...

.......................................................................................................................................... v CHAPTER 1 INTRODUCTION ......................................................................................................... 1 CHAPTER 2 LITERATURE RIVIEW ........................................................................................

......................................................................................................................................... iv CHAPTER 1 INTRODUCTION ......................................................................................................... 1 CHAPTER 2 LITERATURE RIVIEW ............................................................................................... 5...

The infrastructure of large networks is broken down into areas that have a common security policy called a domain. Security within a domain is commonly implemented at all nodes. However this can have a negative effect on performance since it introduces a delay associated with packet filtering. When Access Control Lists (ACLs) are used within a router for this purpose then a significant overhead...