Network topology and exchange time of messages in a local area network using internetwork processors

1997 ◽  
Vol 80 (1) ◽  
pp. 52-61
Author(s):  
Hajime Kanada ◽  
Kaichi Inaba ◽  
Masasi Takeuchi ◽  
Sigeru Yoshizawa
Keyword(s):  
Network Topology ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Exchange Time

scholarly journals Models and methods for local area network topology discovery with incomplete data

2021 ◽  
Vol 20 (1) ◽  
pp. 160-180
Author(s):  
Anton Andreev ◽  
Anton Shabaev
Keyword(s):  
Initial Data ◽  
Network Topology ◽  
Incomplete Data ◽  
Computer Network ◽  
Local Area Network ◽  
Real Life ◽  
Local Area ◽  
Area Network ◽  
Link Layer ◽  
Ambiguous Data

A lot of network management tasks require a description of the logical and physical computer network topology. Obtaining such a description in an automatic way is complicated due to the possibility of incompleteness and incorrectness of the initial data on the network structure. This article provides a study on the properties of incomplete initial data on network device connectivity on the link layer. Methods for generalized handling of the heterogeneous input data on the link layer are included. We describe models and methods for deriving a missing part of the data, as well as the condition in which it is possible to get a single correct network topology description. The article includes algorithms for building a link layer topology description from incomplete data when this data is possible to fulfill up to the required level. Also, we provide methods for detecting and resolving an ambiguity in the data and methods for improving incorrect initial data. Tests and evaluations provided in the article demonstrate the applicability and effectiveness of the build methods for discovering various heterogeneous real-life networks. Additionally, we show advantages of the provided methods over the previous analogs: our methods are able to derive up to 99\% data on link layer connectivity in polynomial time; able to provide a correct solution from an ambiguous data.

Fiber-optic local area network topology

1986 ◽  
Vol 24 (8) ◽  
pp. 26-32 ◽  
Author(s):  
S. Suh ◽  
S. Granlund ◽  
S. Hegde
Keyword(s):  
Network Topology ◽  
Fiber Optic ◽  
Local Area Network ◽  
Local Area ◽  
Area Network

scholarly journals Models and Methods for Discovery of Local Area Network Topology with Incomplete Data

2021 ◽  
Vol 20 (1) ◽  
pp. 68-93
Author(s):  
Andrey Aleshkin ◽  
Stanislav Balakirev ◽  
Valery Nevzorov ◽  
Pavel Savochkin
Keyword(s):  
Initial Data ◽  
Network Topology ◽  
Incomplete Data ◽  
Computer Network ◽  
Local Area Network ◽  
Real Life ◽  
Local Area ◽  
Area Network ◽  
Link Layer ◽  
Ambiguous Data

A lot of network  management tasks require a description of the logical and physical computer network topology. Obtaining such a description in an automatic way is complicated due to the possibility of incompleteness and incorrectness of the initial data on the network structure. This article provides  a study on the properties of incomplete initial data on network device connectivity on the link layer. Methods for generalized handling of the heterogeneous input data on the link layer are included. We describe models and methods for deriving  a missing part of the data, as well as the condition in which it is possible to get a single correct network topology description. The article includes algorithms for building a link layer topology description from incomplete data when this data is possible to fulfill up to the required level. Also, we provide methods for detecting and resolving an ambiguity in the data and methods for improving incorrect initial data. The tests and evaluations provided in the article demonstrate the applicability and effectiveness of the build methods for discovering  various heterogeneous real-life networks. Additionally,  we show the advantages of the provided methods over the previous analogs: our methods are able to derive up to 99% data on link layer connectivity in polynomial time; able to provide a correct solution from an ambiguous data.

scholarly journals Implementasi Encapsulation Jaringan Redudansi VLAN Menggunakan Metode Hot Standby Router Protocol (HSRP)

2020 ◽  
Vol 5 (1) ◽  
pp. 49
Author(s):  
Hendy Dwi Haryoyudhanto ◽  
Iskandar Fitri ◽  
Andri Aningsih
Keyword(s):  
Network Topology ◽  
Packet Loss ◽  
Network Flow ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Optimal Network ◽  
Public Work

Local Area Network is currently often used to minimize a public work, different network segmentation in a building requires attention in designing a network that has dense traffic and often occurs down and vails over on a network flow, certainly requires performance optimal and efficient network, by way of network encapsulation with one channel and dividing each network segmentation by VLAN. The purpose of this paper is to apply a design by optimizing a network using the network redundancy method to create a more optimal network. This redundancy method is a method that moves a network path when downtime occurs on one of the routers that are automatically changed to an active router and a standby router. In the implementation of the design using GNS3 software to create network topology and design. With the results of tests that have been carried out using the simulator, packet loss from using the HSRP method is at VLAN10 0.11%, VLAN20 0.13%, VLAN30 0.30%, VLAN40 0.13%, VLAN50 0.22% AND VLAN60 0.16%. So the purpose of research makes a network more optimal and flexible

scholarly journals Unjuk Kerja IP PBX Asterisk dan FreeSWITCH pada Topologi Bertingkat di Jaringan Kampus

2017 ◽  
Vol 9 (3) ◽  
Author(s):  
Iwan Setiawan ◽  
Azis Wisnu Widhi Nugraha ◽  
Adi Septian Putra Atmaja
Keyword(s):  
Network Topology ◽  
Network Architecture ◽  
Local Area Network ◽  
Local Area ◽  
Area Network ◽  
Campus Network ◽  
Hierarchical Topology ◽  
Delay Jitter ◽  
Communication Devices

Internet Protocol-based Private Branch Exchange (IP PBX) is needed to interconnect/switch calls between VoIP communication devices in a Local Area Network (LAN). VoIP service can be provided by using IP PBX in data/IP networks that are already provisioned. We conduct this research to evaluate VoIP performances of two IP PBXs using Asterisk and FreeSWITCH. We design an experimental network architecture that is adapted from the hierarchical topology in a Campus Area Network (CAN) at the research location that consists of core switch, distribution switch, and access switch. The two IP PBXs are placed at different locations in the hierarchy of the network topology for investigating the effects of the placement to the VoIP performance. This experimental concept can be used as a base for designing architectures of centralized and distributed IP PBXs in campus network. We measure VoIP performance by evaluating the systems with the Quality of Service (QoS) and the Quality of Experience (QoE) parameters. We also monitor processor and memory consumptions that are used by each VoIP server software when communication takes place. The evaluation was conducted on VoIP system with phone-to-phone scenario in the experimental network that is connected to the active campus network. Our results show that IP PBX placement at different hierarchy of the network topology affects to the VoIP performance particularly on Asterisk IP PBX. The performance of FreeSWITCH IP PBX in terms of QoS and QoE is slightly better than the Asterisk one on average latency/delay, jitter, Mean Opinion Score (MOS), and memory consumption. The values are 41,012 ms, 0,060 ms, 5, 1 % for IP PBX 1, and 41,016 ms, 0,066 ms, 5, 0,5 % for IP PBX 2.

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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