scholarly journals Software Model for Determining the Optimal Routes in a Computer Network Based on the Two-Colonial Ant Algorithm

2021 ◽  
pp. 38-49
Author(s):  
V. M Pakhomova ◽  
A. O Opriatnyi
Keyword(s):  
Computer Networks ◽  
Evaporation Rate ◽  
Computer Network ◽  
Optimal Path ◽  
Ant Algorithm ◽  
Optimal Route ◽  
Railway Transport ◽  
Telecommunication System ◽  
Total Delay ◽  
Software Model

Purpose. At present, the computer networks of the information and telecommunication system (ITS) of railway transport use the OSPF protocol, which does not allow taking into account several metrics when determining the optimal route. Therefore, there is a need to study the possibility of organizing routing in computer networks of rail transport ITS using a two-colonial ant algorithm. Methodology. According to the Two-ACO software model, created in the Python language based on the two-colonial ant algorithm, the optimal route in a computer network was determined. Two-ACO model inputs: computer network parameters (network adjacency matrix, number of routers); parameters of the ant algorithm (number of iterations; number of ants in the colony; number of elite ants; initial pheromone level; evaporation rate; parameter for adjusting the amount of pheromone deposition). Findings. The results of the Two-ACO model are presented in the form of graphs depicting the optimal paths: the criterion of the total delay on the routers (for the first colony of ants) and the number of hops (for the second colony of ants). Originality. According to the created Two-ACO software model for a computer network of 7 routers and 17 channels, a study of the time for determining the optimal path in a computer network by the number of ordinary and elite ants, evaporation rate and deposited pheromone was conducted. It is determined that it is enough to use the number of ants equal to the number of routers and have 2 elite ants in the colony, with 1000 iterations, evaporation rate from 0.2 to 0.7, and pheromone deposition by ants close to one. Practical value. Created Two-ACO software model using two colonies of ants on the following criteria: the total delay on the routers (for the first colony of ants) and the number of hops that make up the route (for the second colony of ants) allows you to parallel determine the optimal routes in a computer network of railway transport. It is estimated that for a computer network of 15 routers and 17 channels, it is sufficient to have 30 agents (two ants on top), the value of the pheromone deposited by the agents is close to one, and the evaporation rate is 0.4.

Mathematical Models of Effective Topology of Computer Networks for Electric Power Supply Control on Railway Transport

2022 ◽  
Vol 24 (2) ◽  
pp. C27-C32
Author(s):  
Oleksandr Stasiuk ◽  
Valeriy Kuznetsov ◽  
Vitalii Zubok ◽  
Lidiya Goncharova ◽  
Antonina Muntian
Keyword(s):  
Mathematical Models ◽  
Electric Power ◽  
Computer Networks ◽  
Information Exchange ◽  
Computer Network ◽  
Railway Transport ◽  
Electric Power Supply ◽  
Traction Substations ◽  
Consumption Control ◽  
Intelligent Computer

The paper is devoted to analysis of modern directions of innovation-investment formation of intelligent computer networks that control the fast-moving technological processes of electricity supply. It is based on the conclusion that the problem of increasing the productivity of information exchange between information resources and consumers is dominant. A method for increasing the efficiency of information exchange is proposed as a search for the rational location of a new node and the organization of such a set of its connections among the whole set of nodes of the computer network, which provides a minimum average topological distance. Mathematical models of effective topological organization of connections in computer network of power consumption control at the level of traction substations, electric power distances and the railway in general are proposed.

Network Security System Implementation Using Raspberry Pi-Based Random Port Knocking Sent Via Telegram

2018 ◽  
Vol 7 (2) ◽  
pp. 61-67
Author(s):  
Iga Revva Princiss Jeinever
Keyword(s):  
High Risk ◽  
Network Security ◽  
Computer Networks ◽  
Computer Network ◽  
Security System ◽  
Raspberry Pi ◽  
System Implementation ◽  
The Right ◽  
Network Administrators ◽  
Ip Block

Computer networks are basically not safe to access freely. Security gaps in the network can be seen by irresponsible people with various techniques. Opening a port for access carries a high risk of being attacked by an attacker. In this connection, network administrators are required to work more to be able to secure the computer network they manage. One form of network security that is often used by network administrators in server management is through remote login such as ports on telnet, SSH, etc. A port that is always open is a network security hole that can be used by people who are not responsible for logging into the server. Focusing on these problems, in this study, Random Port Knocking is the right way and can be used to increase network security. With Random Port Knocking, the port will be opened as needed, the port will automatically change when it fails to log in more than three times and IP will automatically be blocked and access will not continue so that attacks on the network can be avoided and network security stability can be further improved. The final result of this research shows that the method applied in this research makes server safe. Because port randomization and IP block make irresponsible parties try harder to penetrate firewall walls.

scholarly journals Cryptographic Key Management for Role-Based Access Control Model in Power System Computer Networks

2021 ◽  
Author(s):  
Celia J. Li
Keyword(s):  
Access Control ◽  
Power Systems ◽  
Power System ◽  
Computer Networks ◽  
Key Management ◽  
Computer Network ◽  
Role Based Access Control ◽  
Computationally Efficient ◽  
Efficient Operation ◽  
Role Based

This thesis research has successfully completed two developments: an efficient Power-system Role-based Access Control (PRAC) and a secure Power-system Role-based kEy management (PREM). The PRAC significantly increases the security of computer networks for power systems, and surmounts the challenges caused by typical security and reliability concerns due to current technological and political changes faced in the electricity power industry. The PREM is designed to support the efficient operation of the PRAC using one-way hash functions and utilizing their advantages of computationally efficient and irreversibility security. PRAC and PREM are not only developed for handling single local computer network domain, but also extended for supporting multiple computer network domains. A platform for the comprehensive assessment of PREM is established for the fast and economical assessment of the key management developed in this thesis research.

scholarly journals Cryptographic Key Management for Role-Based Access Control Model in Power System Computer Networks

2021 ◽  
Author(s):  
Celia J. Li
Keyword(s):  
Access Control ◽  
Power Systems ◽  
Power System ◽  
Computer Networks ◽  
Key Management ◽  
Computer Network ◽  
Role Based Access Control ◽  
Computationally Efficient ◽  
Efficient Operation ◽  
Role Based

This thesis research has successfully completed two developments: an efficient Power-system Role-based Access Control (PRAC) and a secure Power-system Role-based kEy management (PREM). The PRAC significantly increases the security of computer networks for power systems, and surmounts the challenges caused by typical security and reliability concerns due to current technological and political changes faced in the electricity power industry. The PREM is designed to support the efficient operation of the PRAC using one-way hash functions and utilizing their advantages of computationally efficient and irreversibility security. PRAC and PREM are not only developed for handling single local computer network domain, but also extended for supporting multiple computer network domains. A platform for the comprehensive assessment of PREM is established for the fast and economical assessment of the key management developed in this thesis research.

TCP/IP Protocol-Based Model for Increasing the Efficiency of Data Transfer in Computer Networks

2013 ◽  
pp. 116-134
Author(s):  
S.N. John ◽  
A.A. Anoprienko ◽  
C.U. Ndujiuba
Keyword(s):  
Simulation Model ◽  
Computer Networks ◽  
Computer Network ◽  
Data Transfer ◽  
Basic Method ◽  
Imitation Model ◽  
Corporate Networks ◽  
Network Applications ◽  
Modern Computer ◽  
Model And Simulation

This chapter provides solutions for increasing the efficiency of data transfer in modern computer network applications and computing network environments based on the TCP/IP protocol suite. In this work, an imitation model and simulation was used as the basic method in the research. A simulation model was developed for designing and analyzing the computer networks based on TCP/IP protocols suite which fully allows the exact features in realizing the protocols and their impact on increasing the efficiency of data transfer in local and corporate networks. The method of increasing efficiency in the performance of computer networks was offered, based on the TCP/IP protocols by perfection of the modes of data transfer in them. This allows an increased efficient usage of computer networks and network applications without additional expenditure on infrastructure of the network. Practically, the results obtained from this research enable significant increase in the performance efficiency of data transfer in the computer networks environment. An example is the “Donetsk National Technical University” network.

Game Theory for Network Security

Game Theory ◽  
2017 ◽  
pp. 369-382
Author(s):  
Sungwook Kim
Keyword(s):  
Game Theory ◽  
Network Security ◽  
Computer Networks ◽  
Computer Network ◽  
Government Agencies ◽  
Public And Private ◽  
Unauthorized Access ◽  
Access To Data

Network security consists of the provisions and policies adopted by a network administrator to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. It involves the authorization of access to data in a network, which is controlled by the network administrator. Usually, network security covers a variety of computer networks, both public and private, that are used in everyday jobs conducting transactions and communications among businesses, government agencies, and individuals. This chapter explores network security.

Designing Information Systems and Network Components for Situational Awareness

2012 ◽  
pp. 104-123
Author(s):  
Cyril Onwubiko
Keyword(s):  
Information Systems ◽  
Complex Networks ◽  
Computer Networks ◽  
Situational Awareness ◽  
Computer Network ◽  
Distributed Services ◽  
Network Applications ◽  
Systems Software ◽  
Design Requirements

Operators need situational awareness (SA) of their organisation’s computer networks and Information Systems in order to identify threats, estimate impact of attacks, evaluate risks, understand situations, and make sound decisions swiftly and accurately on what to protect against, and how to address incidents that may impact valued assets. Enterprise computer networks are often huge and complex, spanning across several WANs and supporting a number of distributed services. Understanding situations in such dynamic and complex networks is time-consuming and challenging. Operators SA are enhanced through a number of ways, one of which is through the use of situation-aware systems and technology. Designing situation-aware systems for computer network defence (CND) is difficult without understanding basic situational awareness design requirements of network applications and systems. Thus, this chapter investigates pertinent features that are foundation, essential, and beneficial for designing situation-aware systems, software, and network applications for CND.

scholarly journals Evaluation of Network Reliability for Computer Networks with Multiple Sources

2012 ◽  
Vol 2012 ◽  
pp. 1-18 ◽  
Author(s):  
Yi-Kuei Lin ◽  
Louis Cheng-Lu Yeng
Keyword(s):  
New York ◽  
Computer Networks ◽  
Land Surface ◽  
Computer Network ◽  
Network Reliability ◽  
Network Models ◽  
Critical Issue ◽  
The United States ◽  
Service Level ◽  
Multiple Sources

Evaluating the reliability of a network with multiple sources to multiple sinks is a critical issue from the perspective of quality management. Due to the unrealistic definition of paths of network models in previous literature, existing models are not appropriate for real-world computer networks such as the Taiwan Advanced Research and Education Network (TWAREN). This paper proposes a modified stochastic-flow network model to evaluate the network reliability of a practical computer network with multiple sources where data is transmitted through several light paths (LPs). Network reliability is defined as being the probability of delivering a specified amount of data from the sources to the sink. It is taken as a performance index to measure the service level of TWAREN. This paper studies the network reliability of the international portion of TWAREN from two sources (Taipei and Hsinchu) to one sink (New York) that goes through a submarine and land surface cable between Taiwan and the United States.

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