Implementation and Evaluation of the Enhanced Header Compression (IPHC) according to 6LoWPAN Network

6LoWPAN defines how to carry Ipv6 packet over IEEE 802.15.4 low power wireless or sensor networks. Limited bandwidth, memory and energy resources require a careful application of Ipv6 in a LoWPAN network. The aim is to develop personal networks, mainly sensor based, that can be integrated to the existing wellknow network infrastructure by reusing mature and wideused technologies. IPv6 has been chosen as network protocol because its characteristics fit to the problematic that characterize LoWPAN environment such as the large number of nodes to address and stateless address autoconfiguration. However, an IPv6 header compression algorithm is necessary in order to reduce the overhead and save space in data payload. In fact, the IEEE 802.15.4 standard defines an MTU of 128 bytes that decrease to 102 bytes considering the frame overhead, a further reduction is due to the network and transport protocols frame overhead that, in case of Ipv6 and UDP, allow to carry only 33 bytes for application data. The aim of this work is to describe and compares the proposed Ipv6 header compression mechanisms for 6LoWPAN environments

Development of a Graduate Course on the Transition to Internet Protocol Version 6

Internet and mobile connectivity has grown tremendously in the last few decades, creating an ever increasing demand for Internet Protocol (IP) addresses. The pool of Internet Protocol version 4 (IPv4) addresses, once assumed to be more than sufficient for every person on this planet, has reached its final stages of depletion. With The Internet Assigned Numbers Authority’s (IANA) global pools depleted, and four of the five Regional Internet Registries (RIR) pools down to the their last /8 block, the remaining addresses will not last very long. In order to ensure continuous growth of the internet in the foreseeable future, we would need a newer internet protocol, with a much larger address space. Specifically, with that goal in mind the Internet Protocol version 6 (IPv6) was designed about two decades ago. Over the years it has matured, and has proven that it could eventually replace the existing IPv4. This thesis presents the development a graduate level course on the transition to IPv6. The course makes an attempt at understanding how the new IPv6 protocol is different than the currently used IPv4 protocol. And also tries to emphasize on the options existing to facilitate a smooth transition of production networks from IPv4 to IPv6

Utilizing IEEE 802.16 for Aeronautical Communications

Neurology & clinical neurophysiolog

Asiakasreunakytkennän testausalustan kehitys

Customer Edge Switching (CES) and Realm Gateway (RGW) are technologies designed to solve core challenges of the modern Internet. Challenges include the ever increasing amount of devices connected to the Internet and risks created by malicious parties. CES and RGW leverage existing technologies like Domain Name System (DNS). Software testing is critical for ensuring correctness of software. It aims to ensure that products and protocols operate correctly. Testing also aims to find any critical vulnerabilities in the products. Fuzz testing is a field of software testing allowing automatic iteration of unexpected inputs. In this thesis work we evaluate two CES versions in performance, in susceptibility of Denial of Service (DoS) and in weaknesses related to use of DNS. Performance is an important metric for switches. Denial of Service is a very common attack vector and use of DNS in new ways requires critical evaluation. The performance of the old version was sufficient. Some clear issues were found. The version was vulnerable against DoS. Oversights in DNS operation were found. The new version shows improvement over the old one. We also evaluated suitability of expanding Robot Framework for fuzz testing Customer Edge Traversal Protocol (CETP). We conclude that the use of the Framework was not the best approach. We also developed a new testing framework using Robot Framework for the new version of CES.Customer Edge Switching (CES) asiakasreunakytkentä ja Realm Gateway (RGW) alueen yhdyskäytävä tarjoavat ratkaisuja modernin Internetin ydinongelmiin. Ydinongelmiin kuuluvat kytkettyjen laitteiden määrän jatkuva kasvu ja pahantahtoisten tahojen luomat riskit. CES ja RGW hyödyntävät olemassa olevia tekniikoita kuten nimipalvelua (DNS). Ohjelmistojen oikeellisuuden varmistuksessa testaus on välttämätöntä. Sen tavoitteena on varmistaa tuotteiden ja protokollien oikea toiminnallisuus. Testaus myös yrittää löytää kriittiset haavoittuvuudet ohjelmistoissa. Sumea testaus on ohjelmistotestauksen alue, joka mahdollistaa odottamattomien syötteiden automaattisen läpikäynnin. Tässä työssä arvioimme kahden CES version suorituskykyä, palvelunestohyökkäyksien sietoa ja nimipalvelun käyttöön liittyviä heikkouksia. Suorituskyky on tärkeä mittari kytkimille. Palvelunesto on erittäin yleinen hyökkäystapa ja nimipalvelun uudenlainen käyttö vaatii kriittistä arviointia. Vanhan version suorituskyky oli riittävä. Joitain selviä ongelmia löydettiin. Versio oli haavoittuvainen palvelunestohyökkäyksille. Löysimme epätarkkuuksia nimipalveluiden toiminnassa. Uusi versio vaikuttaa paremmalta kuin vanha versio. Arvioimme työssä myös Robot Framework testausalustan laajentamisen soveltuvuutta Customer Edge Traversal Protocol (CETP) asiakasreunalävistysprotokollan sumeaan testaukseen. Toteamme, ettei alustan käyttö ollut paras lähestymistapa. Esitämme myös työmme Robot Framework alustaa hyödyntävän testausalustan kehityksessä nykyiselle CES versiolle. Kehitimme myös uuden testausalustan uudelle CES versiolle hyödyntäen Robot Frameworkia