scholarly journals A method for generating a local network graph based on the analysis of address sets

2021 ◽  
Vol 21 (3) ◽  
pp. 284-289
Author(s):  
V. V. Galushka ◽  
D. V. Fatkhi ◽  
E. R. Gazizov
Keyword(s):  
Local Area Network ◽  
Local Area ◽  
Local Network ◽  
Area Network ◽  
Communication Line ◽  
Relative Location ◽  
Network Graph ◽  
Local Networks ◽  
Hardware Complex ◽  
Software And Hardware

Introduction. The paper deals with the problem of automated construction of a local area network using tools and methods for traffic analysis at the link layer of OSI model. The problem is caused by two factors. These are difficulties of the manual determination of the communication between equipment and the lack of physical access to communication lines of an already functioning network. The purpose of the work is to reduce the time spent on building a local network diagram through automating the process of determining the communication between the equipment.Materials and Methods. To solve the set tasks, a method for determining the relative location of devices is proposed. The network adapters of a specialized software and hardware complex, which are connected to a communication line break at different points of the network, are used in opposite directions. The method used is based on calculations of intersections of address sets received from these adapters. The structural schemes of the construction of such a software and hardware complex and the requirements for it are given. The methods of obtaining MAC addresses from transit packets are described. Examples of libraries of software components for performing this operation are given. The structure of a relational database is proposed for storing the received data. The format and content of the fields of its table are described.Results. Using the developed methods, a typical example of an Ethernet network shows a way to determine the relative location of end devices specified by their MAC addresses, as well as at least two switches located between them. The signs by which it is possible to judge the presence of switching equipment in a particular segment are determined. A method is proposed that enables through using a set of relational operations, to sequentially refine the network topology until the required accuracy is achieved.Discussion and Conclusions. The results obtained can be used under the administration of large local networks with an extensive structure. The proposed approach allows you to reduce the time required for building a scheme. This is possible due to the automation of the process of obtaining information about devices operating on the network and their mutual location.

scholarly journals DESIGN AND SIMULATION OF VIRTUAL LOCAL AREA NETWORK USING CISCO PACKET TRACER

THE BULLETIN ◽  
2020 ◽  
Vol 6 (388) ◽  
pp. 6-14
Author(s):  
Оrdabayeva G.К. ◽  
◽  
Dzhusupbekova G.T. ◽  
Rakhymbek N. ◽  
◽  
...  
Keyword(s):  
Network Performance ◽  
Local Area Network ◽  
Local Area ◽  
Local Network ◽  
Area Network ◽  
Local Networks ◽  
Transmission Of Information ◽  
Network Equipment ◽  
Packet Tracer ◽  
E Mail

Modern local networks consist of several subscriber devices located inside the same building. Computers on the local network are interconnected using network equipment - switches. By default, all devices connected to the ports of the same switch can communicate by exchanging network packets. Computer networks of data transmission are the result of the information revolution and in the future will be able to form the main means of communication. The worldwide trend towards the integration of computers in the network is due to a number of important reasons, such as the acceleration of the transmission of information messages, the ability to quickly exchange information between users, receiving and transmitting messages (faxes, E-mail letters, electronic conferences, etc.) without leaving the workplace, the ability to instantly receive any information from anywhere in the world, as well as the exchange of information between computers of different manufacturers working under different software. A large number of broadcast packets sent by devices leads to a decrease in network performance, because instead of useful operations, the switches are busy processing data addressed to everyone at once. The situation forces us to divide such large networks into autonomous subnets; as a result, the logical structures of the network are different from the physical topologies. This article discusses VLAN technology (Virtual Local Area Network - VLAN), which allows you to divide one local network into separate segments.

Study of the Valuation of Multimode Optical Fibers by Translation of Transmission Techniques of Optical Fiber and High Speed Mimo Radio Frequency in Local Area Network.

2020 ◽  
Vol 10 (10) ◽  
pp. 30-36
Author(s):  
MANKITI FATI Aristide ◽  
NKOUKA MOUKENGUE Charmolavy Goslavy Lionel ◽  
LOEMBE SOUAMY Rostand Martialy Davy ◽  
PASI BENGI MASATA NZONZOLO André ◽  
NZIENGUI MABIKA Camille
Keyword(s):  
Optical Fiber ◽  
Radio Frequency ◽  
New Technologies ◽  
Transfer Functions ◽  
Local Area Network ◽  
Local Network ◽  
Area Network ◽  
Modulation Formats ◽  
Local Networks ◽  
Multimode Optical Fiber

— In this paper, we focused on making a study of the valuation of multimode optical fiber which is used a lot in local networks and yet that we talk less in this last decade which knows an increase of new technologies using an enormous speed. To do so, we made a translation between radio frequency MIMO and optical MIMO; a study which has already been carried out in a framework of comparison of two technologies and in the literature, this convergence is already possible. Note that this is done in terms of transfer functions and of which we have made a very explicit analytical study compared to other studies already carried out in the literature for an educational and didactic objective for future studies in this context. Then we focused on doing our valuation study of multimode optical fiber, through optical MIMO technology, and our thinking was based on the quality of the signal at reception, for this, a study of modulation formats was made, because with the rise of technologies, this of course leads to an increase in speeds, so that certain formats tend to almost total disappearance. During this study, the RZ (Return to zero) format is much better in a larger local network, in terms of its Q factor and NRZ (None Return to Zero), for a smaller network, depending on its bit error rate (BER) and their eye diagrams which have a very large aperture and this is extended for the RZ format.

scholarly journals TECHNICAL PRINCIPLES FOR CREATING A WIRELESS LOCAL NETWORK WI-FI

T-Comm ◽  
2021 ◽  
Vol 15 (7) ◽  
pp. 28-33
Author(s):  
Albina Y. Sharifullina ◽  
◽  
Roman R. Galyamov ◽  
Rimma S. Zaripova ◽  
◽  
...  
Keyword(s):  
Wireless Networks ◽  
Wireless Network ◽  
Wireless Lan ◽  
Wireless Local Area Network ◽  
Local Area Network ◽  
Local Area ◽  
Local Network ◽  
Area Network ◽  
Access Points ◽  
Basic Service

This article discusses the stages of development, characteristics of a wireless local area network Wi-Fi, options for its topology and equipment used. Currently, there are such different types of wireless networks as Wireless Wide Area Network, Wireless Metropolitan Area Networks (Wireless Neighborhood Area Network), Wireless Local Area Network, Wireless Personal Area Network. Each of the listed wireless networks has its own specific range and application. Wireless LAN Wi-Fi refers to the Wireless Local Area Network. The first wireless LAN standard, Wi-Fi, was approved in 1997. From the moment of their appearance to the present day, the following standards of this network have appeared: 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac, 802.11ad, 802.11ax. For each standard, the speeds and frequency ranges at which the data transmission was carried out are indicated, and the technologies on which they are built are described. Wireless LAN Wi-Fi has three topologies: 1) Ad-Hoc (point-to-point) or Independent Basic Service Set; 2) Basic Service Set (“client / server”) and 3) Extended Service Set (“extended service areas”). To build a Wi-Fi network, network adapters, access points, routers, ADSL modems, Wi-Fi phones, Wi-Fi antennas, Wi-Fi repeaters are used. Wi-Fi adapters are used by devices that do not have a built-in Wi-Fi module. Wi-Fi access points are designed for organizing wireless access within a local network. Wi-Fi routers are designed to route traffic on a computer network. ADSL modems are used to access the Internet over a telephone line. Wi-Fi repeaters are used to expand the coverage of a wireless network using already installed equipment. Wi-Fi phones are wireless IP phones. Wi-Fi antennas are used to extend the range of a wireless network.

scholarly journals Data Processing Method in Medium Range Coastal Radar Complex

2018 ◽  
pp. 35-41
Author(s):  
Dang Quang Hieu ◽  
Nguyen Xuan Truong
Keyword(s):  
Situation Awareness ◽  
Local Area Network ◽  
Local Area ◽  
Radar Data ◽  
System Structure ◽  
Local Network ◽  
Area Network ◽  
Monitoring And Control ◽  
Fusion Algorithm ◽  
And Control

The article presents the basic principles of design and development of integrated middle range Coastal Surveillance System (CSS) used for water surface lookout. It provides solutions for such missions as command and control of maritime forces, border monitoring and control, prevention of illegal activities such as piracy, smuggling, illegal immigration, illegal fishing, supporting search and rescue (SAR) operations, and creates a common situation awareness picture of the Naval Theatre. The system structure diagram is designed to solve computational overload problem when processing large volume of data received from radar stations. The measurement-level fusion algorithm is developed based on the JPDA framework, in which radar data received from a single or group of radars and AIS data is aggregated in a processing center. The servers and workstations make use of local area network (LAN), using standard Gigabit Ethernet technologies for local network communications. Acquisition, analysis, storage and distribution of target data is executed in servers, then the data is sent to automated operator stations (console), where functional operations for managing, identifying and displaying of target on digital situational map are performed.

scholarly journals Desain Jaringan Komputer Terintegrasi Menggunakan Arsitektur Campus LAN

2020 ◽  
Vol 2 (1) ◽  
pp. 25-32
Author(s):  
Jeckson Sidabutar
Keyword(s):  
Information Technology ◽  
Network Architecture ◽  
Enterprise Architecture ◽  
Business Processes ◽  
Computer Network ◽  
Local Area Network ◽  
Rapid Development ◽  
Local Area ◽  
Local Network ◽  
Area Network

The development of Information and Communication Technology (ICT) to access and provide information quickly and accurately becomes very important for an organization (commercial, tertiary, government, or individual). With the rapid development of ICT, it is necessary to consider the dangers and disadvantages of misuse in local network services or in internet-based applications. Campus LAN (Local Area Network) architecture was chosen as the standard used in computer network design. The network architecture approach in this study is a enterprise architecture approach that is used for organizational logic and planning throughout the organization and aims to determine how information technology will support business processes. This method begins by identifying the infrastructure and network security needs, as well as how the information technology system supports the process of activities for all parts of education, administration and other services.

Earth Lab: A Local Network for Collaborative Classroom Science

1987 ◽  
Vol 15 (3) ◽  
pp. 237-247 ◽  
Author(s):  
Denis Newman ◽  
Shelley V. Goldman
Keyword(s):  
Local Area Network ◽  
Science Curriculum ◽  
Sixth Grade ◽  
Local Area ◽  
Local Network ◽  
Observational Research ◽  
Network System ◽  
Area Network ◽  
Classroom Organization ◽  
Computer Lab

This article reports the implementation and research related to the first phase of the field test of a local area network system developed to support collaborative science activities in elementary school classrooms. The Earth Lab Project developed system and application software to run on a network of Apple II computers in a classroom or computer lab. The project also developed a sixth-grade science curriculum built around geographic issues, such as weather and climate. Observational research focused on issues such as classroom organization and the extent of collaborative planning among teachers. Preliminary results indicate that the network system is beginning to act as a catalyst for student collaboration and cross-curriculum integration.

Strathnet—a local area network

1981 ◽  
Vol 1 (1) ◽  
pp. 21 ◽  
Author(s):  
David Hutchison ◽  
Doug Shepherd
Keyword(s):  
Local Area Network ◽  
Local Area ◽  
Area Network

A Local Area Network for Medical Research; Planning, Realization and Experience

1991 ◽  
Vol 30 (01) ◽  
pp. 53-64 ◽  
Author(s):  
R. Schosser ◽  
C. Weiss ◽  
K. Messmer
Keyword(s):  
Medical Research ◽  
Word Processing ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Test Installation ◽  
Cost Performance ◽  
The Public ◽  
On Line ◽  
The University

This report focusses on the planning and realization of an interdisciplinary local area network (LAN) for medical research at the University of Heidelberg. After a detailed requirements analysis, several networks were evaluated by means of a test installation, and a cost-performance analysis was carried out. At present, the LAN connects 45 (IBM-compatible) PCs, several heterogeneous mainframes (IBM, DEC and Siemens) and provides access to the public X.25 network and to wide-area networks for research (EARN, BITNET). The network supports application software that is frequently needed in medical research (word processing, statistics, graphics, literature databases and services, etc.). Compliance with existing “official” (e.g., IEEE 802.3) and “de facto” standards (e.g., PostScript) was considered to be extremely important for the selection of both hardware and software. Customized programs were developed to improve access control, user interface and on-line help. Wide acceptance of the LAN was achieved through extensive education and maintenance facilities, e.g., teaching courses, customized manuals and a hotline service. Since requirements of clinical routine differ substantially from medical research needs, two separate networks (with a gateway in between) are proposed as a solution to optimally satisfy the users’ demands.

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