Computer Networking

Access Control Lists (ACLs) represent a traditional way in filtering packets in routers. In modern complex enterprise networks that provide a vast array of services, there is an ever increasing need for verifying the integrity of ACLs to detect any potential security holes and improve the network performance. This paper concerns the integrity of routers' ACLs in large enterprise networks. We first investigate the integrity of the ACLs of two routers by describing a bottom-up approach for detecting redundancies in ACLs of two routers. We then extend our study to multiple routers and provide a heuristic algorithm for detecting redundant ACLs in multiple routers. We validate the practicality of our algorithm through real-life and synthetic router ACL groups of large networks. Performance results show that our heuristic algorithm don't only improve the performance by reducing the number of comparisons overhead, but also helps in discovering potential security holes that cannot be discovered by considering the ACLs of each router individually.

A determinação dos mecanismos básicos e dos critérios de implantação de um pacote de software de rede num sistema operacional específico é apresentada em detalhe. Em seguida, são analisadas alternativas de arquitetura de rede susceptíveis de implantação no sistema alvo, no caso, uma arquitetura particular e outra seguindo o modelo de referência RM-OSI/ISO. Finalmente, o detalhamento da arquitetura escolhida, RM-OSI/ISO é apresentado com considerações sobre sua implantação e o escopo das aplicações suportadas.

Mobile operators currently prefer optimizing their radio networks via re-homing or cutting over the cell sites in 2G
or 3G networks. The core network, as the parental part of radio network, is inevitably impacted by the re-homing in radio domain. This paper introduces the cell site re-homing in radio network and analyzes its impact on the performance of GSM/UMTS core network. The possible re-homing models are created and analyzed for core networks. The paper concludes that appropriate re-homing in radio domain, using correct algorithms, not only optimizes the radio network but also helps improve the QoS of the core network and saves the carriers’ OPEX and CAPEX on their core networks

The drastic development of the World Wide Web in the recent times has made the concept of Web Crawling receive remarkable significance. The voluminous amounts of web documents swarming the web have posed huge challenges to the web search engines making their results less relevant to the users. The presence of duplicate and near duplicate web documents in abundance has created additional overheads for the search engines critically affecting their performance and quality. The detection of duplicate and near duplicate web pages has long been recognized in web crawling research community. It is an important requirement for search engines to provide users with the relevant results for their queries in the first page without duplicate and redundant results. In this paper, we have presented a novel and efficient approach for the detection of near duplicate web pages in web crawling. Detection of near duplicate web pages is carried out ahead of storing the crawled web pages in to repositories. At first, the keywords are extracted from the crawled pages and the similarity score between two pages is calculated based on the extracted keywords. The documents having similarity scores greater than a threshold value are considered as near duplicates. The detection has resulted in reduced memory for repositories and improved search engine quality.

Index Terms— Web Crawling, Generic Crawling, Focused Crawling, Web Mining, Search Indexing, Web Parsing, Keywords Extracted, Page Ranking, Similarity Score Calculation

Cloud computing has formed the conceptual and infrastructural basis for tomorrow’s computing. The global computing infrastructure is rapidly moving towards cloud based architecture. While it is important to take advantages of could base computing by means of deploying it in diversified sectors, the security aspects in a cloud based computing environment remains at the core of interest. Cloud based services and service providers are being evolved which has resulted in a new business trend based on cloud technology. With the introduction of numerous cloud based services and geographically dispersed cloud service providers, sensitive information of different entities are normally stored in remote servers and locations with the possibilities of being exposed to unwanted parties in situations where the cloud servers storing those information are compromised. If security is not robust and consistent, the flexibility and advantages that cloud computing has to offer will have little credibi...

This paper considers a computation method for
accepting data about the present status of a motor, and then
controlling it to move in a specific direction, up to a specific
limit using the CANopen communication protocol. The
investigation is focused on developing a reliable algorithm for
controlling such motors in a CANopen network with multiple
nodes (based on the BioBike project being carried out at
Hochschule Ulm, Germany). PIC microcontrollers are used to
communicate over the CAN bus-network, along with a
Bluetooth interface to communicate with a control program on
a remote computer. The major considerations in coding the
embedded programs for such communication are explained.
Special attention is paid to the management of data traffic and
to improving the response of various nodes over the network.

UNIX memiliki tujuan dalam Computer Networking, maka kemampuan dari UNIX dalam memberikan jasa internet lebih berkembang dan lebih reliable. Banyak orang mengatakan bahwa bernetwork ria dengan UNIX lebih cepat dibandingkan dengan sistem operasi lain nya. Tetapi hal ini relatif, dikatakan relatif karena banyak faktor yang menentukan performasi network dan tidak semudah itu untuk dibandingkan.

Saat ini UNIX sudah tidak terbatas sebagai komputer server atau pemberi layanan internet. Sekarang UNIX sudah mampu menggantikan fungsi Windows sebagai komputer workstation atau alat untuk bekerja sehari-hari, dan lebih stabil. Hal ini disebabkan oleh perkembangan UNIX yang mulai terlihat prospeknya sebagai sistem operasi workstation uga, tanpa meninggalkan arah perkembangan dalam Computer Networking.

UNIX lebih stabil dibandingkan dengan sistem operasi lainnya, hal ini disebabkan konsep dan proses pembuatan karnel. Salah satu kestabilan UNIX adalah tidak pernah mengalami kegagalan sistem yang disebabkan oleh sistem oprerasi tersebut.

Since the introduction of Automated Teller Machines (ATMs) in Nigeria, cash handling has really reduced especially for those who live in the city and have easy access to ATM
machines by means of their ATM cards. People no longer see the needs to carry excess cash at home when they already have an ATM card since ATM machines can be easily
accessible. ATM operation did not turn out to be all rosy as it started out. This research
surveys ATM malfunctions in four states in Nigeria to ascertain the nature of malfunction that is prevalent and formulates a modification algorithm/routine that should possibly correct this ATM misfit

Cloud    computing    has    formed    the    conceptual    and    infrastructural    basis    for    tomorrow’s  computing.    The  global  computing  infrastructure  is  rapidly  moving  towards  cloud  based architecture.  While  it  is  important to  take  advantages  of  could  base  computing  by  means  of deploying  it in diversified  sectors,  the security aspects in a cloud based computing environment remains  at the  core  of interest.  Cloud  based  services  and service  providers  are  being  evolved which  has resulted  in a new  business  trend  based  on cloud  technology. With  the  introduction  of  numerous  cloud  based  services  and  geographically  dispersed  cloud  service providers,  sensitive  information  of  different  entities  are  normally  stored  in remote  servers  and  locations with  the  possibilities  of  being  exposed  to  unwanted  parties  in  situations  where  the  cloud servers  storing those  information  are  compromised.  If  security  is  not  robust  and  consistent, the  flexibility  and  advantages that  cloud  computing has  to  offer  will  have  little  credibility.  This  paper  presents  a  review  on  the  cloud  computing  concepts  as  well  as  security  issues inherent within  the  context of  cloud  computing and  cloud infrastructure.

This paper treats the problem of authentication through the multi-hop communication, authorization to services access, and efficient collaboration between ad hoc nodes in order to assure efficient packet relaying during services access, thus alleviating major problems in ad hoc networks deployment. A novel solution is proposed allowing for authentication and authorization of services, while coupling the accounting process for each user (ad hoc node) with his level of collaboration in terms of participation in packets relaying for other nodes. The billing of services takes a novel notion, where it concerns not only `debit', which classically happens, but also `credit' as a reward for collaborative users. The authentication and authorization for services access mechanism has been implemented and integrated in an ad hoc mesh platform, where multimedia applications have been tested, and performance evaluation has been done.

Wireless charging is a technique of transmitting power through an air gap to an electrical device for the purpose of energy replenishment. Recently, the wireless charging technology has been significantly advanced in terms of efficiency and functionality. This article first presents an overview and fundamentals of wireless charging. We then provide the review of standards, i.e., Qi and Alliance for Wireless Power (A4WP), and highlight on their communication protocols. Next, we propose a novel concept of wireless charger networking which allows chargers to be connected to facilitate information collection and control. We demonstrate the application of the wireless charger network in user-charger assignment, which clearly shows the benefit in terms of reduced costs for users to
identify the best chargers to replenish energy for their mobile devices.

Documento referente a la teoría de flujos (Streams) en Java para lograr la comunicación entre procesos.

El principal objetivo de este paper es explicar el uso, funcionamiento el implementación de los flujos de entrada y salida en Java, con esto podremos asegurarnos de comprender y poner en práctica el manejo de archivos que serán siempre muy útiles al momento de trabajar con comunicación de procesos y bases de datos.

International Journal of Computer Networks & Communications (IJCNC)

(Scopus, ERA Listed)


ISSN 0974 - 9322 (Online); 0975 - 2293 (Print)


http://airccse.org/journal/ijcnc.html

New Issue: January 2020, Volume 12, Number 1 --- Table of Contents

http://airccse.org/journal/ijc2020.html

The International Journal of Computer Networks & Communications (IJCNC) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of Computer Networks & Communications. The journal focuses on all technical and practical aspects of Computer Networks & data Communications. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced networking concepts and establishing new collaborations in these areas.

International Journal of VLSI design & Communication Systems (VLSICS) is a bi monthly open access peer-reviewed journal that publishes articles which contribute new results in all areas of VLSI Design & Communications. The goal of this journal is to bring together researchers and practitioners from academia and industry to focus on advanced VLSI Design & communication concepts and establishing new collaborations in these areas.

Authors are solicited to contribute to this journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the VLSI design & Communications.

—Datacenters provide cost-effective and flexible access to scalable compute and storage resources necessary for today's cloud computing needs. A typical datacenter is made up of thousands of servers connected with a large network and usually managed by one operator. To provide quality access to the variety of applications and services hosted on datacenters and maximize performance, it deems necessary to use datacenter networks effectively and efficiently. Datacenter traffic is often a mix of several classes with different priorities and requirements. This includes user-generated interactive traffic, traffic with deadlines, and long-running traffic. To this end, custom transport protocols and traffic management techniques have been developed to improve datacenter network performance. In this tutorial paper, we review the general architecture of datacenter networks, various topologies proposed for them, their traffic properties, general traffic control challenges in datacenters and general traffic control objectives. The purpose of this paper is to bring out the important characteristics of traffic control in datacenters and not to survey all existing solutions (as it is virtually impossible due to massive body of existing research). We hope to provide readers with a wide range of options and factors while considering a variety of traffic control mechanisms. We discuss various characteristics of datacenter traffic control including management schemes, transmission control, traffic shaping, prioritization, load balancing, multipathing, and traffic scheduling. Next, we point to several open challenges as well as new and interesting networking paradigms. At the end of this paper, we briefly review inter-datacenter networks that connect geographically dispersed datacenters which have been receiving increasing attention recently and pose interesting and novel research problems. To measure the performance of datacenter networks, different performance metrics have been used such as flow completion times, deadline miss rate, throughput and fairness. Depending on the application and user requirements, some metrics may need more attention. While investigating different traffic control techniques, we point out the trade-offs involved in terms of costs, complexity and performance. We find that a combination of different traffic control techniques may be necessary at particular entities and layers in the network to improve the variety of performance metrics. We also find that despite significant research efforts, there are still open problems that demand further attention from the research community.

In recent years, AdHoc networks have been attracting much interest in both academic and industrial communities. International Journal on AdHoc Networking Systems is an open access peer-reviewed journal that serves as a forum to discuss on ongoing research and new contributions. The journal addresses both practical and theoretical research in the areas of ad hoc networks, sensor networks, mesh networks and vehicular networks. Its main focus is on all issues from link layer up to the application layer. The journal solicits original technical papers that were not previously published and are not currently under review for publication elsewhere.

1.Pendahuluan
2. Definisi Internet
3. Sekilas tentang jaringan komputer
4. Sejarah Internet
5. Keuntungan dan Kerugian penggunaan internet
6. Mode Pengalamatan Internet
7. URL dan Domain
8. Konektivitas ke Internet
9. Aplikasi Layanan Internet

Content found picture recovery (CBIR) proposed a productive approach to investigate the
pictures from bigger database. The preprocessing, highlight extraction and separation
comparative measurements are the key parameters for recovery execution utilizing separation
comparative measurements.
This experiment or paper estimate the four different distance metrics such as Manhattan ,
Euclidean , Standard Euclidean and Chebychev distance metrics to discover the best related
quality access, the important for image retrieval. To make the use of the HSV model convert
normal images to RGB format of color images, then the RGB color images changes to HSV
format of images, simply using mat lab codes, after feature extraction using distance similar
metrics by calculating and comparing the two images, the two images means Inquiry picture
and Database pictures finding the likenesses between the pictures and concentrate
comparable number of pictures from the database.
The main goal of our project work is finding the accuracy, reduce the searching time and also
get any number of output images as related to query image from the database.

The International Journal of peer-to-peer networking is a quarterly open access peer-reviewed journal that publishes articles that contribute new results in all areas of P2P Networks. The journal provides a platform to disseminate new ideas and new research, advance theories, and propagate best practices in the area of P2P networking. This will include works that relate to peer-to-peer systems, peer-to-peer applications, grid systems, large-scale distributed systems, and overlay networks. The journal offers a forum in which academics, consultants, and practitioners in a variety of fields can exchange ideas to further research and improve practices in all areas of P2P. Authors are solicited to contribute to the journal by submitting articles that illustrate research results, projects, surveying works and industrial experiences that describe significant advances in the areas of P2P networks.

In computer networking, the Media Access Control (MAC) address is a unique value associated with a network adapter. MAC addresses are also known as hardware addresses or physical addresses. TCP/IP and other mainstream networking architectures generally adopt the OSI model. MAC addresses function at the data link layer (layer 2 in the OSI model). They allow computers to uniquely identify themselves on a network at this relatively low level. In this paper, suggested data encryption technique is presented by using the MAC address as a key that is used to authenticate the receiver device like PC, mobile phone, laptop or any other devices that is connected to the network. This technique was tested on some data, visual and numerical measurements were used to check the strength and performance of the technique. The experiments showed that the suggested technique can be used easily to encrypt data that is transmitted through networks.

https://sites.google.com/site/ijcsis/

In distributed system, the coordinator is needed to manage the use of the resources in the shared environment. Many algorithms have been proposed for the same. They have various positive and negative parts. Here we will discuss those issues which ensure the efficiency of the algorithm for election leader. Here a comparison will be provided to show the advantages and disadvantages of different election algorithms. The comparison would be based on the number of messages passing and the order of time complexity.

Today’s data networks are steadily growing in size and complexity. Especially in enterprise networks, these development lead to the requirement of a central network administration. With Software Defined Networking (SDN), this requirement can be fulfilled. However, new security considerations such as the protection of the central component must be taken into account. Motivated by the new security requirements that security should play a key role in SDN architectures. This paper chooses some architectures, namely, the Path Computation Element (PCE), 4D, and the Secure Architecture for the Networked Enterprise (SANE). These architectures are analyzed with respect to its security capabilities using Microsoft’s threat modeling technique, STRIDE. The analysis shows that architectures such as PCE and 4D are vulnerable to tampering and information disclosure as
well as Denial of Service attacks. The detected threats can
be mitigated by using standard technologies such as TLS and
IPsec for securing the communication between interactors.