scholarly journals Implementation Basic Network Design with Netkit For Evaluation of Network Learning

2019 ◽  
Vol 15 (08) ◽  
pp. 18
Author(s):  
Yuri Ariyanto ◽  
Budi Harijanto ◽  
Yan Watequlis S.
Keyword(s):  
Network Design ◽  
Network Topology ◽  
Computer Network ◽  
Virtual Laboratory ◽  
Virtual Laboratories ◽  
Network Topologies ◽  
Low Costs ◽  
Network Emulator ◽  
Practical Trial ◽  
Basic Network

A virtual laboratory with a network emulator environment using NetKit is one of series of basic network laboratories on basic computer network competencies where students are given practical trial opportunities at low costs and little effort in their implementation. Teaching computer network subjects to be easily understood by students needs an instructional media as a tool in delivering material. This media uses computer virtualization technology, i.e. creating a virtual laboratory, as a means of students in conducting experiments from the material that has been obtained. In virtual laboratories it is possible to implement network topology designs based on actual network topologies. This implementation is used as a testing tool before the network topology is implemented on the actual network. Therefore, errors can be identified first without disturbing the system that is already running. For testing, the students are given training using a basic network design consisting of the implementation of routing tests, firewalls, ftp server implementation and web server. This paper is aimed at describing ways to develop a virtual laboratory with a network emulator environment using NetKit. Moreover, several exercises on network topology implementation that are applied directly to the real world with NetKit are introduced, such as describing laboratory settings, describing the main parts of the lab, illustrating lab instructions, and reporting lab feeds.

scholarly journals jaringan komputer di cafe

2020 ◽  
Author(s):  
Indraseptyjakarsi ◽  
habilmaulana ◽  
Pandu Pratama Putra M.Kom
Keyword(s):  
Network Design ◽  
Computer Networks ◽  
Computer Network ◽  
Ip Address ◽  
Data Services ◽  
Network Load ◽  
Share Data ◽  
Network Topologies ◽  
Network Device

A computer network is a system consisting of several computers that are designed to be able to share data, information, and resources. The purpose of computer networks is that every part of a computer network can request and provide information and data services. The party requesting or receiving the service is called the client and who sends or sends the service is called the server. In the Teaching Department of the Faculty of Engineering, Janabadra University designs using existing star-type network topologies so that network load development is not centered on switch hardware. In network design the proxy is a network device that functions as a gateway and router. In the configuration of IP Address use DHCP Server to facilitate the installation of new computers on the network. New computers don't need to be configured manually, it will automatically connect to the network

scholarly journals jurnal jaringan internet

2020 ◽  
Author(s):  
dwimuladi ◽  
hardiansyah ramadhan ◽  
Pandu Pratama Putra M.Kom
Keyword(s):  
Network Design ◽  
Computer Networks ◽  
Computer Network ◽  
Ip Address ◽  
Data Services ◽  
Network Load ◽  
Share Data ◽  
Network Topologies ◽  
Network Device

A computer network is a system consisting of several computers that are designed to be able to share data, information, and resources. The purpose of computer networks is that every part of a computer network can request and provide information and data services. The party requesting or receiving the service is called the client and who sends or sends the service is called the server. In the Teaching Department of the Faculty of Engineering, Janabadra University designs using existing star-type network topologies so that network load development is not centered on switch hardware. In network design the proxy is a network device that functions as a gateway and router. In the configuration of IP Address use DHCP Server to facilitate the installation of new computers on the network. New computers don't need to be configured manually, it will automatically connect to the network

scholarly journals Use of Virtualization Technology for Linux Firewall Implementation in Teaching Computer Network

2018 ◽  
Vol 7 (4.44) ◽  
pp. 237
Author(s):  
Yuri Ariyanto ◽  
Budi Harijanto ◽  
Yan Watequlis S. ◽  
Awan Setiawan ◽  
Erfan Rohadi
Keyword(s):  
Network Topology ◽  
Computer Network ◽  
Network Simulation ◽  
Simulation Software ◽  
Topology Design ◽  
Virtual Laboratory ◽  
Teaching Process ◽  
Real Network ◽  
Virtualization Technology ◽  
Network Topology Design

This paper describes the use of virtualization technology in the linux network teaching process in linux firewall implementation. The problem that is often faced by teacher and student is the limitation of computer devices in implementing network topology design. The use of virtualization technology can be used as a device to create a virtual network laboratory, which is an implementation of real laboratories and network simulation software that is useful to explain the concept of computer network management. With this in mind, it can provide an overview of project characteristics, especially the implementation of linux networks in the area of virtualization technology. Linux network virtualization implementation to help the teaching process used netkit. Netkit can be used as a linux network simulation, where each virtual machine host has a linux operating system, and can implement a computer network based on the design of a real network topology. The method used to implement the Linux firewall by creating a virtual laboratory, where virtual laboratories are built based on the real network topology design. Testing is done on a virtual laboratory by implementing a network topology design and running based on a test scenario. 

scholarly journals Optimal Coordination of Over-Current Relays in Microgrids Using Unsupervised Learning Techniques

2021 ◽  
Vol 11 (3) ◽  
pp. 1241
Author(s):  
Sergio D. Saldarriaga-Zuluaga ◽  
Jesús M. López-Lezama ◽  
Nicolás Muñoz-Galeano
Keyword(s):  
Unsupervised Learning ◽  
Distributed Generation ◽  
Network Topology ◽  
International Electrotechnical Commission ◽  
Number Of Clusters ◽  
Learning Techniques ◽  
Topology Changes ◽  
Network Topologies ◽  
Optimal Coordination ◽  
Operational Modes

Microgrids constitute complex systems that integrate distributed generation (DG) and feature different operational modes. The optimal coordination of directional over-current relays (DOCRs) in microgrids is a challenging task, especially if topology changes are taken into account. This paper proposes an adaptive protection approach that takes advantage of multiple setting groups that are available in commercial DOCRs to account for network topology changes in microgrids. Because the number of possible topologies is greater than the available setting groups, unsupervised learning techniques are explored to classify network topologies into a number of clusters that is equal to the number of setting groups. Subsequently, optimal settings are calculated for every topology cluster. Every setting is saved in the DOCRs as a different setting group that would be activated when a corresponding topology takes place. Several tests are performed on a benchmark IEC (International Electrotechnical Commission) microgrid, evidencing the applicability of the proposed approach.

scholarly journals Optimal Multiculture Network Design for Maximizing Resilience in the Face of Multiple Correlated Failures

2019 ◽  
Vol 9 (11) ◽  
pp. 2256
Author(s):  
Yasmany Prieto ◽  
Nicolás Boettcher ◽  
Silvia Elena Restrepo ◽  
Jorge E. Pezoa
Keyword(s):  
Network Design ◽  
Optimization Problems ◽  
Current Data ◽  
Sequential Optimization ◽  
Node Degree ◽  
Network Resilience ◽  
Correlated Failures ◽  
The Face ◽  
Network Operation ◽  
Network Topologies

Current data networks are highly homogeneous because of management, economic, and interoperability reasons. This technological homogeneity introduces shared risks, where correlated failures may entirely disrupt the network operation and impair multiple nodes. In this paper, we tackle the problem of improving the resilience of homogeneous networks, which are affected by correlated node failures, through optimal multiculture network design. Correlated failures regarded here are modeled by SRNG events. We propose three sequential optimization problems for maximizing the network resilience by selecting as different node technologies, which do not share risks, and placing such nodes in a given topology. Results show that in the 75% of real-world network topologies analyzed here, our optimal multiculture design yields networks whose probability that a pair of nodes, chosen at random, are connected is 1, i.e., its ATTR metric is 1. To do so, our method efficiently trades off the network heterogeneity, the number of nodes per technology, and their clustered location in the network. In the remaining 25% of the topologies, whose average node degree was less than 2, such probability was at least 0.7867. This means that both multiculture design and topology connectivity are necessary to achieve network resilience.

scholarly journals ANALYSIS OF DEVELOPMENT NEEDS VIRTUAL LABORATORY FOR LEARNING VOCATIONAL SCHOOL PRACTICES IN THE PANDEMIC TIME COVID-19

2021 ◽  
Vol 5 (2) ◽  
Author(s):  
Eskawati Musyarofah Bunyamin ◽  
Eveline Siregar Siregar ◽  
Dwi Kusumawardani Kusumawardani
Keyword(s):  
Health And Safety ◽  
Vocational School ◽  
Virtual Laboratory ◽  
Ministry Of Education ◽  
School Practices ◽  
Face To Face ◽  
Need Analysis ◽  
Virtual Laboratories ◽  
Face To Face Learning ◽  
Open Face

During the COVID-19 pandemic, schools did not open face-to-face learning services. The Ministry of Education and Culture has issued a policy learning from Home (BDR) to support the principles of the Education Policy in the COVID-19 Pandemic that the health and safety of students, educators, education personnel, families, and the community is the top priority. However, learning in Vocational School (SMK) is mostly based on practice so that BDR activities cannot be implemented. One thing that is done to overcome this is that some practicum activities can be executed using multimedia known as virtual laboratories. The aim of this study is to conduct a need analysis for the development of a virtual laboratory.  Needs analysis is carried out to gather data about gaps and needs as well profiles of students that can be used as a basis or reference in developing virtual laboratory at the next stage. Data collection was carried out by means of observation, interviews, and distributing questionnaires. The results showed that a virtual laboratory was needed to support practical learning for vocational students.

scholarly journals Representações Quantitativas em Laboratórios Virtuais para o Ensino de Química

2021 ◽  
Vol 22 (2) ◽  
pp. 152-159
Author(s):  
Alessandro Félix Pascoin ◽  
José Wilson P Carvalho
Keyword(s):  
Qualitative Research ◽  
Knowledge Construction ◽  
Teaching And Learning ◽  
Learning Processes ◽  
Virtual Laboratory ◽  
Virtual Labs ◽  
Chemistry Teaching ◽  
Virtual Laboratories ◽  
Peircean Semiotics ◽  
Quantitative Nature

Resumo Os laboratórios virtuais utilizados no ensino de Química se constituem importantes recursos didáticos para o avanço dos processos de ensino e aprendizagem, ao passo que podem contribuir para ações de mediação na construção do conhecimento. A presente pesquisa teve como objetivo analisar as representações quantitativas que estão presentes nas interfaces de laboratórios virtuais à luz da Semiótica Peirceana. É uma pesquisa qualitativa exploratória, realizada no repositório portal PhET–Interative Simulation. No percurso da pesquisa foram encontrados 51 aplicativos, desses seis exibiam características de laboratório virtual e três foram semioticamente analisados. Os resultados indicam que três laboratórios apresentam disposições parcialmente satisfatórias nas representações quantitativas que abordam. Esses podem vir a contribuir para o fortalecimento do ensino da Química, por meio de ilustrações, simulações e a participação interativa do estudante. Quanto às possibilidades, esses oferecem diferentes ambientes, formatos e modelos para o estudo desta ciência. Também foram encontradas limitações como a insuficiência de signos iconográficos de ordem quantitativa considerados indispensáveis na conjuntura conceitual de determinados tópicos da Química. As indicações desta pesquisa são para se pensar a respeito dos signos que vão representar a natureza quantitativa da Química, transformando os desafios em possibilidades para os processos de ensino e aprendizagem desta ciência. Palavras-chave: Semiótica. Ensino de Química. Laboratórios Virtuais. Abstract Virtual laboratories used in chemistry teaching are important didactic resources for the advancement of teaching and learning processes, while they can contribute to mediation actions in the knowledge construction. This research aims to analyze the quantitative representations that are present in the virtual laboratories interfaces in light of Peircean semiotics. It is an exploratory qualitative research, conducted at the portal PhET – Interative Simulation. During the research, 51 applications were found, of these, 6 exhibited virtual laboratory characteristics and three were semiotically analyzed. The results indicate that three laboratories have partially satisfactory arrangements in the quantitative representations they address. They can contribute to the strengthening of chemistry teaching through illustrations, simulations and interactive student participation. As for the possibilities they offer different environments, formats and models for the study of this science. Limitations were also found as the insufficiency of quantitative iconographic signs considered indispensable in the conceptual conjuncture of certain topics of chemistry. The indications of this research are to think about the signs that will represent the Chemistry quantitative nature, turning the challenges into possibilities for the teaching and learning processes of this science. Keywords: Semiotics. Chemistry Teaching. Virtual Labs.

scholarly journals JURNAL SIMULASI PERANCANGAN JARINGAN LAN PADA WARNET YO

2020 ◽  
Author(s):  
ADITYA WIRAGUNA ◽  
Tisa Seftiananda ◽  
Pandu Pratama Putra M.Kom
Keyword(s):  
Network Design ◽  
Computer Network ◽  
Network System ◽  
Network Connection ◽  
Packet Tracer ◽  
The Cost

Computer network connection is a fundamental thing and is very important in the establishment of internet cafe businesses. LAN network design must also consider the cost budget so that the use of tools can be maximized and not cause losses. If the connection is problematic, then all types of applications that run through a computer network cannot be used. Cisco Packet Tracer can be used for simulations that reflect a picture of the computer network connection on the network system to be used

scholarly journals Mobile Virtual Laboratory as Innovative Strategy to Improve Learners’ Achievement, Attitudes, and Learning Environment in Teaching Chemistry

2021 ◽  
Vol 2 (5) ◽  
pp. 398-400
Author(s):  
Resty C. Samosa
Keyword(s):  
Learning Environment ◽  
Positive Impact ◽  
The Body ◽  
Virtual Laboratory ◽  
Teaching Chemistry ◽  
Innovative Strategy ◽  
Virtual Laboratories ◽  
Achievement Attitudes ◽  
Positive Learning Environment ◽  
Laboratory Experiences

As our world becomes more technologically advanced, research suggests that technology-rich learning environments support students as well. Mobile Virtual Laboratories can be used to replicate physical laboratories and augment the incorporation of technology inside science classrooms in an attempt to provide students with laboratory experiences that would not otherwise be available in high school settings. This study measured the effectiveness of mobile virtual laboratory as innovative strategy to improve learners’ achievement, attitudes, and learning  environment in teaching chemistry. The study utilized one-group pretest–posttest design. The innovative strategy is calculated using this design by measuring the difference between the pretest and posttest scores, attitudes and learning  environment in teaching chemistry. The study revealed that the utilization of the innovative strategy mobile virtual laboratory in teaching chemistry showed that learners have a strong positive attitude. More so, the learners have a strong positive learning environment when exposed to the innovative strategy mobile virtual laboratory based on the six domain of learning environment in teaching chemistry. As shown by the significantly higher mean in the posttest than in the pretest, the innovative strategy mobile virtual laboratory had a positive impact on the learners' achievement. Consequently, the learners exposed to the mobile virtual laboratory in teaching chemistry are significantly differ in pretest and posttest results. The findings of this study have the potential to reassure educational professionals, contribute to the body of research within the field of chemistry achievement, attitudes, and learning  environment, and encourage further research into the efficacy of mobile virtual laboratories as a teaching tool.

TRANSMISSION RELIABILITY OF A STOCHASTIC IMPERFECT VERTEX COMPUTER NETWORK WITH PACKET UNRELIABILITY AND TIME ATTRIBUTES

2013 ◽  
Vol 20 (05) ◽  
pp. 1350018
Author(s):  
YI-KUEI LIN ◽  
CHENG-FU HUANG
Keyword(s):  
Network Topology ◽  
Packet Loss ◽  
Data Center ◽  
Computer Network ◽  
Packet Delay ◽  
Solution Procedure ◽  
Transmission Reliability ◽  
Reliability Issue ◽  
Internet Data Center

Quality of the received data at the sink can be based on packet delay, packet errors, packet loss, etc. From the viewpoint of quality of service (QoS), the packet unreliability (PU) and transmission time are both of critical attributes to assess internet quality for supervisor and customers. A computer system is usually modeled as a network topology with arcs and vertices where each arc denotes a transmission medium and each vertex represents an Internet data center. Due to failure, partial failure, maintenance, etc., each component (arc or vertex) should be considered as stochastic. The network with imperfect vertices is more complex to evaluate the reliability issue because vertex failure results in the disablement of adjacent arcs. Such a network named a stochastic imperfect vertex computer network (SIVCN) is addressed in this paper. We study how the data can be delivered through multiple minimal paths simultaneously within both permitted PU and time constraint. A solution procedure comprising two efficient algorithms is proposed to assess transmission reliability accordingly.

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