At the beginning, this paper describes basic overview of Cloud Computing (CC) and its usage among companies. Second part describes how is Cloud Computing being taught on another schools and companies around the world. Next, there is description of our physical and logical topology, used during experiments. In the next part, there are descriptions of experiments we made during semester while teaching cloud related subjects. This is followed by results of measurements of used resources in our CC system.

At the beginning, there is overview of three basic Cloud Computing services - SaaS, PaaS and laaS. There is a definition of these services review, advantages and their security problems and effects. Next part tells about portability problems of each service, mainly the IaaS service, which has the most interoperability and portability problems.

When a link or router failure occurs in a routed network, there is unpredictable period of network traffic interruption. This problem persists until network reconverges on the new topology. New technology which solves these problems after link or router failure has been developed - IP Fast Reroute (IPFRR). Currently, there are several IPFRR solutions developed primarily by IETF. The design of IPFRR mechanism differs in the principle of pre-calculated repair paths. In this paper we propose IPFRR mechanism, which was originally inspired by a new protocol - Bit Index Explicit Replication (BIER). Some of the main benefits of BIER protocol are the way how to effectively store specific information into a string of bits and optimal multicast forwarding without need of intermediate routers to store any per-flow state or to build explicit tree.

In the beginning, this paper describes basic overview of cloud. What is a cloud, what types of a cloud do we know, types of network mechanisms used in clouds nowadays. Next, there is description of OpenStack, one of most widely deployed cloud infrastructure. This is followed by description of Cloud implemented on Department of InfoCom networks on University of Žilina. In the last part, there is vision of future usage of clouds in education as well as in research.