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For more than 50 years, satellite systems have been utilized in various fields and this trend is still progressing. Therefore experts and specialists in this domain are still required and efficient trainings are needed. Unfortunately, laboratory experiments for investigation of the satellite-Earth systems are difficult to realize so suitable visualization tools are efficient way how to support education...
Internet protocol version 6 as a successor of the IPv4 protocol is being slowly deployed in Internet and so it becomes basis of all Internet communications. Its functions, principles and elements belong to fundamental knowledge of all network experts, administrators, researchers and ICT students. There are several public Internet information portals dealing with IPv6 topics offering visitors various...
Analysis of the performance of various communication networks is often realized by researchers using simulation tools which can be free or commercially oriented. Network simulator (v.2) is a free, powerful and worldwide used simulation tool but it is not equipped by a graphical interface and therefore users have to spend additional time to gain an ability to work with it. This considerably restricts...
Present time is characterized by a variety of fixed and mobile smart technologies which provide users with a lot of new functions and possibilities. Every day new applications come into being and extend the service portfolio. Rapid evolution was noted in a domain of mobile end devices running the Android operating system. Current application base covers a number of areas from games via business to...
Television, radio and a lot of other multimedia services belong today among the most used sources of information and entertainment. Digitalization allowed television to bring it to end users not only in a high definition quality but also with many other data services. This is the case of digital video broadcasting systems that can distribute video, radio and data directly to users terrestrially, by...
IPsec and TLS based VPN technologies are widely used in nowadays networks. But one can hardly find information about their performance, especially compared to each other. So when there was a speed and delay sensitive interconnection project, a direct performance comparison had to be performed. This article realizes a performance comparison of Open VPN and IPSec based VPN; we measure what throughput...
During the last decade, considerable effort was made in the area of ad-hoc networks at various levels of reference model OSI. In this paper DSR and DYMO routing protocols are investigated in two building environments (factory and office) with and without parasitical communication. Main comparison is realized based on the average time of packet delivery and the packet loss rate. We show that DYMO works...
E-learning has brought a new approach into the learning. E-learning is mainly based on the self-learning and consultations with the lector. This article presents the set of new e-learning courses and certification exams oriented at the ICT areas. The description of the courses will be given and the arrangement of the courses will be described. The different kinds of questions for the certification...
This contribution is oriented to the analysis, investigation and comparison of current leading network simulators on the basis of their abilities to simulate a new emerging system called IP multimedia subsystem. We identify relevant representatives of simulators (based on SIP support), we summarise their main supported features (networks, protocols and methods) and then we concentrate on their IMS...
Multimedia services including text, audio and video media are main engine in the communication area at the present time. There are available several communication systems, each one utilizing some protocol architecture with a certain level of transmission efficiency. This contribution analyses and compares transmission efficiency/overhead of various protocols and protocol stacks.
The present situation in telecommunication domain is characterized by a main evolution trend-a convergence of the voice and data networks to the new next generation networks. Broadband satellite networks are one of the many networks which will be involved inside these networks where IP protocol appears to be a basic network protocol. However, QoS support is the weakness of IP and MPLS scheme could...
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