This chapter discusses computer networks and communications. It defines networks as collections of connected computers and devices that allow sharing of resources and data. The chapter describes different types of networks including LANs, MANs, and WANs. It also explains common network devices, transmission media, and wireless communication standards used to connect computers and transmit data. The chapter provides an overview of how computer communications work and examples of applications like email, instant messaging, and file transfers that rely on computer networks.
This document discusses computer networks and communications. It begins by describing the basic components of a communications system, including sending and receiving devices connected by a communications channel. It then discusses the various uses of computer communications, such as email, instant messaging, wireless messaging, and Internet access. The document outlines different types of networks including LANs, WANs, and wireless networks. It also describes common network topologies and standards used for networking, such as Ethernet, TCP/IP, Wi-Fi, Bluetooth, and RFID.
This document provides an overview of objectives for a chapter on databases. It defines key database terms like data, database, and information. It describes the hierarchy of data from characters to fields to records to files. It explains the differences between file processing and database approaches. It also discusses relational, object-oriented, and multidimensional databases and how database management systems provide tools for querying, entering, and reporting data.
This document provides objectives for a chapter that discusses computer communications and networks. It begins by defining computer communications and its basic components. It then lists several objectives related to differentiating between various network types like LANs, MANs, and WANs; network architectures like client/server and peer-to-peer; and network topologies like star, bus, and ring networks. It also describes various uses of computer communications technologies and standards used for network communications.
This document provides an overview of the key objectives and content covered in Chapter 4 of Discovering Computers 2012, which discusses system unit components. The chapter explores the components inside the system unit, including the motherboard, processor, memory, expansion slots, ports, buses, and power supply. It defines important concepts like volatile and non-volatile memory, RAM, ROM, and cache memory. The chapter also examines data representation using bits and bytes, compares various processors on the market, and provides guidance on cleaning computer systems.
LTE provides significantly higher data throughput and lower latency than previous mobile network technologies. This allows for improved quality of experience for users accessing real-time services like voice calls, gaming, and video. LTE will also enable new high bandwidth services like HD video and multi-user interactive gaming. Alcatel-Lucent's LTE solution aims to meet users' quality of experience expectations and reduce costs for network operators by introducing a flat IP architecture.
This document summarizes a research paper on developing a peer-to-peer communication framework for Android devices. The framework allows developers to leverage built-in communication capabilities like WiFi, Bluetooth, and 3G without dealing with underlying networking implementations. The objectives are to explore peer-to-peer networks as an alternative infrastructure for smartphones. Experimental results show the peer-to-peer architecture provides better scalability and lower costs than a traditional client-server model. The open-source framework implements a modified Gnutella protocol and has been used to develop multi-user chat and gaming applications on Android.
This report provides an overview of e-commerce and information security. It discusses key elements of a B2C online transaction including payment systems and fulfillment. It also covers issues companies face with international commerce such as intellectual property, tax implications, and complying with local regulations. Finally, it provides steps to build a basic website, including registering a domain name, hosting the site, designing pages, optimizing for search engines, testing before going live, and promoting the site.
This chapter discusses computer communications and networks. It describes the components needed for successful communications including sending and receiving devices, communications software, and transmission media. Various network types such as LANs, WANs, intranets and extranets are defined. Common network devices like routers, hubs, switches and wireless access points are explained. Both physical wired media like twisted pair and fiber optic cables and wireless transmission media are covered. Network standards including Ethernet, TCP/IP, Wi-Fi, Bluetooth and others are also outlined.
This document discusses computer networks and communications. It begins by describing the basic components of a communications system, including sending and receiving devices connected by a communications channel. It then discusses the various uses of computer communications, such as email, instant messaging, wireless messaging, and Internet access. The document outlines different types of networks including LANs, WANs, and wireless networks. It also describes common network topologies and standards used for networking, such as Ethernet, TCP/IP, Wi-Fi, Bluetooth, and RFID.
This document provides an overview of objectives for a chapter on databases. It defines key database terms like data, database, and information. It describes the hierarchy of data from characters to fields to records to files. It explains the differences between file processing and database approaches. It also discusses relational, object-oriented, and multidimensional databases and how database management systems provide tools for querying, entering, and reporting data.
This document provides objectives for a chapter that discusses computer communications and networks. It begins by defining computer communications and its basic components. It then lists several objectives related to differentiating between various network types like LANs, MANs, and WANs; network architectures like client/server and peer-to-peer; and network topologies like star, bus, and ring networks. It also describes various uses of computer communications technologies and standards used for network communications.
This document provides an overview of the key objectives and content covered in Chapter 4 of Discovering Computers 2012, which discusses system unit components. The chapter explores the components inside the system unit, including the motherboard, processor, memory, expansion slots, ports, buses, and power supply. It defines important concepts like volatile and non-volatile memory, RAM, ROM, and cache memory. The chapter also examines data representation using bits and bytes, compares various processors on the market, and provides guidance on cleaning computer systems.
LTE provides significantly higher data throughput and lower latency than previous mobile network technologies. This allows for improved quality of experience for users accessing real-time services like voice calls, gaming, and video. LTE will also enable new high bandwidth services like HD video and multi-user interactive gaming. Alcatel-Lucent's LTE solution aims to meet users' quality of experience expectations and reduce costs for network operators by introducing a flat IP architecture.
This document summarizes a research paper on developing a peer-to-peer communication framework for Android devices. The framework allows developers to leverage built-in communication capabilities like WiFi, Bluetooth, and 3G without dealing with underlying networking implementations. The objectives are to explore peer-to-peer networks as an alternative infrastructure for smartphones. Experimental results show the peer-to-peer architecture provides better scalability and lower costs than a traditional client-server model. The open-source framework implements a modified Gnutella protocol and has been used to develop multi-user chat and gaming applications on Android.
This report provides an overview of e-commerce and information security. It discusses key elements of a B2C online transaction including payment systems and fulfillment. It also covers issues companies face with international commerce such as intellectual property, tax implications, and complying with local regulations. Finally, it provides steps to build a basic website, including registering a domain name, hosting the site, designing pages, optimizing for search engines, testing before going live, and promoting the site.
This chapter discusses computer communications and networks. It describes the components needed for successful communications including sending and receiving devices, communications software, and transmission media. Various network types such as LANs, WANs, intranets and extranets are defined. Common network devices like routers, hubs, switches and wireless access points are explained. Both physical wired media like twisted pair and fiber optic cables and wireless transmission media are covered. Network standards including Ethernet, TCP/IP, Wi-Fi, Bluetooth and others are also outlined.
The document provides an overview of objectives for Chapter 3 of Discovering Computers 2012, which includes summarizing different types of application software such as business, graphics, multimedia, personal, and communications software. It also discusses how application software works with operating systems and utility programs, as well as learning tools available for application software including online help, web-based help, and web-based training.
The document discusses networking fundamentals including how computer and telephone networks work, connecting to a network, and email basics. It covers networking topics like peer-to-peer networks, local area networks, wide area networks, client-server models, intranets, and extranets. Benefits of networking include communicating, sharing resources, and dedicated servers. Disadvantages include dependency on the network, security risks, autonomy loss, and vulnerability to viruses. Connections can be made via cable, fiber optics, wireless or other methods, and bandwidth is classified as low or high.
1. Email is the essential foundation for digital communications. Soon, most emails will be read on mobile devices.
2. Multi-channel messaging achieves maximum reach by leveraging different communication platforms. Metrics provide insights into effectiveness.
3. Online communities make collaboration easier and proactive information drives citizen satisfaction. Integrations expand communication technology capabilities.
The document describes various computer output devices and their characteristics. It discusses display devices like LCD monitors, plasma displays, and projectors. It covers different printer types such as inkjet printers, photo printers, and multifunction devices. Other output devices mentioned include speakers, headphones, data projectors, interactive whiteboards, and accessories for disabled users. The document provides details on each type of output device's purpose, features, and uses.
Cloud computing: new challenge to the entire computer industryStudying
This document discusses cloud computing and its architecture. It defines cloud computing as using internet and remote servers to maintain data and applications, allowing more efficient computing through centralized resources. The document outlines the three layers of cloud computing: Applications, Platforms, and Infrastructure. Applications are software delivered as a service. Platforms provide computing platforms and tools without managing underlying hardware. Infrastructure provides virtualized computer systems and resources as a utility service.
The document discusses the system development life cycle (SDLC) which includes planning, analysis, design, implementation, operation, and maintenance phases. In the planning phase, project requests are reviewed and resources are allocated. The analysis phase involves preliminary investigation and detailed analysis to understand user needs and recommend solutions. Tools used in analysis include entity-relationship diagrams, data flow diagrams, and a project dictionary.
Videoconferencing in heterogeneous environmentsVideoguy
This document describes an integrated videoconferencing system called Global Multimedia Collaboration System (Global-MMCS) that allows heterogeneous multimedia clients to participate in real-time sessions. Global-MMCS provides support for protocols like H.323, SIP, and Access Grid and includes components like a session server, gateways, and media server. The session server manages sessions using an XML-based protocol while the media server facilitates audio and video transfer between clients, implementing functions like mixing and transcoding. The system aims to integrate different conferencing communities in an easy-to-use way by translating between their various protocols.
The document defines an operating system and system software. It describes the common functions of operating systems such as starting up and shutting down computers, providing a user interface, managing memory and programs. It summarizes several types of stand-alone, server, and embedded operating systems. It also describes several common utility programs that operate systems use to perform maintenance tasks like file management, backups, firewalls, and disk cleanup.
IJCER (www.ijceronline.com) International Journal of computational Engineerin...ijceronline
This document summarizes mobile cloud computing (MCC), which refers to running applications and storing data on centralized servers in the cloud rather than locally on mobile devices. The key benefits of MCC include overcoming limitations of mobile devices like limited processing power, storage, and battery life. It discusses existing approaches like offloading processing to remote servers and using efficient encoding to reduce data transferred over wireless networks. The document also outlines the architecture of MCC involving a viewer component on mobile devices that acts as a remote display for applications running on cloud servers.
DIGIPARTY – A DECENTRALIZED MULTI-PARTY VIDEO CONFERENCING SYSTEMVideoguy
1) DigiParty is a fully distributed multi-party video conferencing system that employs a full mesh conferencing architecture and a loosely coupled conferencing mode.
2) It uses a novel conference control protocol and can be integrated with existing instant messaging services like MSN Messenger.
3) The system allows users to start video conferences by sending invitations through instant messages that include the inviter's IP address and a unique conference ID, allowing recipients to join easily.
Peter Ludin, Vice-President EMEA Telecom Solutions, Draka Communications
Demands of a modern network, how to balance network quality & costs, creating value through innovation and current & future innovations in the passive layer.
prove efficiency and reduce another. They’re very honest
costs. VDI is one of those
The document discusses a Virtual Desktop Infrastructure (VDI) solution based on Oracle's Sun technologies that can help brokers. They’re not going to
thin client systems. The solution improves security, mobility, and high availability while reducing energy costs and support steer you wrong or steer you
expenses. It increases productivity by allowing users to access their desktop environment from any thin client. Leveraging towards something that doesn’t
relationships with major technology providers, the solution transforms the working environment to a virtualized one with make sense for your organiza-
benefits such as decreased operating costs,
This presentation explains first the strategic, technical, and financial advantages unlocked by OpenSplice DDS. Then it provides migration use cases as well as specific tactics and guidelines.
Jennifer Kaplan, Product Marketing Manager, GovDelivery, discuss 9 rules for digital communications as part of GovDelivery's 2013 Digital Communications Tour.
This document describes a proposed software framework called SmartX that aims to provide advanced network security for the Windows operating system. SmartX seeks to overcome drawbacks of virtual private networks (VPNs) by reducing buffer copies and protocol overhead during network packet transmission. It uses a mutual identity algorithm for authentication between endpoints and 128-bit AES encryption of packets. The framework would reside in the Network Driver Interface Specification (NDIS) and modify packets before transmission to provide secure and efficient communication with reduced processing overhead compared to standard VPNs.
The document discusses key aspects of a proposed push-to-talk service, version 1.0. It provides an overview of push-to-talk functionality, describing it as an "always on" one-to-one and one-to-many voice communication service initiated with a single button press. It then covers technical implementation using GPRS networks, potential features and limitations, and benchmark pricing consisting of a subscription fee and additional airtime charges.
This document provides an overview of objectives and content covered in Chapter 9 of the textbook "Discovering Computers 2012". It discusses computer communications, uses of computer communications such as email and web browsing, advantages of networks, types of networks including LANs and WANs, network topologies, communication standards, setting up communications over telephone networks, communications devices, and setting up home networks. The chapter also covers topics like client/server networks, peer-to-peer networks, intranets and extranets. Diagrams and figures are included to illustrate key concepts.
This document provides an overview of key topics covered in Chapter 9 of Discovering Computers 2012, including computer communications, uses of computer communications such as email and web browsing, advantages of networks, types of networks including LANs WANs and P2Ns, network topologies, network communication standards like Ethernet and TCP/IP, communications software, communications devices over telephone networks like DSL and cable modems, and setting up home networks. The chapter uses diagrams and figures to illustrate these concepts.
Lecture-5: Introduction to Networks & Data Communication Mubashir Ali
The document provides an overview of key topics related to computer networks and data communication that will be covered in Lecture 05, including:
1) The objectives of the lecture which are to discuss the components required for successful communication, describe uses of computer networks, differentiate types of networks, and describe network communication standards.
2) A definition of computer communication as the process of transferring data, instructions, and information between two or more computers or devices.
3) Examples of uses of computer communication including email, instant messaging, file transfer, wireless messaging, and collaboration software.
The document discusses computer communications and networking. It describes how computers transfer data through communication channels and devices. Examples of computer communications include texting, picture messaging, video chatting, and wireless internet access. Networks connect computers to allow sharing of hardware, data, software and more. Common network types include local area networks (LANs), wide area networks (WANs), and wireless networks. The document also examines networking standards, topologies, and communications devices like modems, routers, and switches that allow data transfer between connected computers and networks.
This chapter discusses computer communications and networks. It describes the components needed for successful communications, including sending/receiving devices, communications devices, communications channels, and transmission media. The chapter discusses uses of computer communications like the internet, email, and collaboration software. It describes different types of networks including LANs, WANs, client/server networks, and peer-to-peer networks. Standards like TCP/IP, Ethernet, and wireless technologies are also covered. The chapter concludes with sections on communications software, devices, and setting up home networks.
The document provides an overview of objectives for Chapter 3 of Discovering Computers 2012, which includes summarizing different types of application software such as business, graphics, multimedia, personal, and communications software. It also discusses how application software works with operating systems and utility programs, as well as learning tools available for application software including online help, web-based help, and web-based training.
The document discusses networking fundamentals including how computer and telephone networks work, connecting to a network, and email basics. It covers networking topics like peer-to-peer networks, local area networks, wide area networks, client-server models, intranets, and extranets. Benefits of networking include communicating, sharing resources, and dedicated servers. Disadvantages include dependency on the network, security risks, autonomy loss, and vulnerability to viruses. Connections can be made via cable, fiber optics, wireless or other methods, and bandwidth is classified as low or high.
1. Email is the essential foundation for digital communications. Soon, most emails will be read on mobile devices.
2. Multi-channel messaging achieves maximum reach by leveraging different communication platforms. Metrics provide insights into effectiveness.
3. Online communities make collaboration easier and proactive information drives citizen satisfaction. Integrations expand communication technology capabilities.
The document describes various computer output devices and their characteristics. It discusses display devices like LCD monitors, plasma displays, and projectors. It covers different printer types such as inkjet printers, photo printers, and multifunction devices. Other output devices mentioned include speakers, headphones, data projectors, interactive whiteboards, and accessories for disabled users. The document provides details on each type of output device's purpose, features, and uses.
Cloud computing: new challenge to the entire computer industryStudying
This document discusses cloud computing and its architecture. It defines cloud computing as using internet and remote servers to maintain data and applications, allowing more efficient computing through centralized resources. The document outlines the three layers of cloud computing: Applications, Platforms, and Infrastructure. Applications are software delivered as a service. Platforms provide computing platforms and tools without managing underlying hardware. Infrastructure provides virtualized computer systems and resources as a utility service.
The document discusses the system development life cycle (SDLC) which includes planning, analysis, design, implementation, operation, and maintenance phases. In the planning phase, project requests are reviewed and resources are allocated. The analysis phase involves preliminary investigation and detailed analysis to understand user needs and recommend solutions. Tools used in analysis include entity-relationship diagrams, data flow diagrams, and a project dictionary.
Videoconferencing in heterogeneous environmentsVideoguy
This document describes an integrated videoconferencing system called Global Multimedia Collaboration System (Global-MMCS) that allows heterogeneous multimedia clients to participate in real-time sessions. Global-MMCS provides support for protocols like H.323, SIP, and Access Grid and includes components like a session server, gateways, and media server. The session server manages sessions using an XML-based protocol while the media server facilitates audio and video transfer between clients, implementing functions like mixing and transcoding. The system aims to integrate different conferencing communities in an easy-to-use way by translating between their various protocols.
The document defines an operating system and system software. It describes the common functions of operating systems such as starting up and shutting down computers, providing a user interface, managing memory and programs. It summarizes several types of stand-alone, server, and embedded operating systems. It also describes several common utility programs that operate systems use to perform maintenance tasks like file management, backups, firewalls, and disk cleanup.
IJCER (www.ijceronline.com) International Journal of computational Engineerin...ijceronline
This document summarizes mobile cloud computing (MCC), which refers to running applications and storing data on centralized servers in the cloud rather than locally on mobile devices. The key benefits of MCC include overcoming limitations of mobile devices like limited processing power, storage, and battery life. It discusses existing approaches like offloading processing to remote servers and using efficient encoding to reduce data transferred over wireless networks. The document also outlines the architecture of MCC involving a viewer component on mobile devices that acts as a remote display for applications running on cloud servers.
DIGIPARTY – A DECENTRALIZED MULTI-PARTY VIDEO CONFERENCING SYSTEMVideoguy
1) DigiParty is a fully distributed multi-party video conferencing system that employs a full mesh conferencing architecture and a loosely coupled conferencing mode.
2) It uses a novel conference control protocol and can be integrated with existing instant messaging services like MSN Messenger.
3) The system allows users to start video conferences by sending invitations through instant messages that include the inviter's IP address and a unique conference ID, allowing recipients to join easily.
Peter Ludin, Vice-President EMEA Telecom Solutions, Draka Communications
Demands of a modern network, how to balance network quality & costs, creating value through innovation and current & future innovations in the passive layer.
prove efficiency and reduce another. They’re very honest
costs. VDI is one of those
The document discusses a Virtual Desktop Infrastructure (VDI) solution based on Oracle's Sun technologies that can help brokers. They’re not going to
thin client systems. The solution improves security, mobility, and high availability while reducing energy costs and support steer you wrong or steer you
expenses. It increases productivity by allowing users to access their desktop environment from any thin client. Leveraging towards something that doesn’t
relationships with major technology providers, the solution transforms the working environment to a virtualized one with make sense for your organiza-
benefits such as decreased operating costs,
This presentation explains first the strategic, technical, and financial advantages unlocked by OpenSplice DDS. Then it provides migration use cases as well as specific tactics and guidelines.
Jennifer Kaplan, Product Marketing Manager, GovDelivery, discuss 9 rules for digital communications as part of GovDelivery's 2013 Digital Communications Tour.
This document describes a proposed software framework called SmartX that aims to provide advanced network security for the Windows operating system. SmartX seeks to overcome drawbacks of virtual private networks (VPNs) by reducing buffer copies and protocol overhead during network packet transmission. It uses a mutual identity algorithm for authentication between endpoints and 128-bit AES encryption of packets. The framework would reside in the Network Driver Interface Specification (NDIS) and modify packets before transmission to provide secure and efficient communication with reduced processing overhead compared to standard VPNs.
The document discusses key aspects of a proposed push-to-talk service, version 1.0. It provides an overview of push-to-talk functionality, describing it as an "always on" one-to-one and one-to-many voice communication service initiated with a single button press. It then covers technical implementation using GPRS networks, potential features and limitations, and benchmark pricing consisting of a subscription fee and additional airtime charges.
This document provides an overview of objectives and content covered in Chapter 9 of the textbook "Discovering Computers 2012". It discusses computer communications, uses of computer communications such as email and web browsing, advantages of networks, types of networks including LANs and WANs, network topologies, communication standards, setting up communications over telephone networks, communications devices, and setting up home networks. The chapter also covers topics like client/server networks, peer-to-peer networks, intranets and extranets. Diagrams and figures are included to illustrate key concepts.
This document provides an overview of key topics covered in Chapter 9 of Discovering Computers 2012, including computer communications, uses of computer communications such as email and web browsing, advantages of networks, types of networks including LANs WANs and P2Ns, network topologies, network communication standards like Ethernet and TCP/IP, communications software, communications devices over telephone networks like DSL and cable modems, and setting up home networks. The chapter uses diagrams and figures to illustrate these concepts.
Lecture-5: Introduction to Networks & Data Communication Mubashir Ali
The document provides an overview of key topics related to computer networks and data communication that will be covered in Lecture 05, including:
1) The objectives of the lecture which are to discuss the components required for successful communication, describe uses of computer networks, differentiate types of networks, and describe network communication standards.
2) A definition of computer communication as the process of transferring data, instructions, and information between two or more computers or devices.
3) Examples of uses of computer communication including email, instant messaging, file transfer, wireless messaging, and collaboration software.
The document discusses computer communications and networking. It describes how computers transfer data through communication channels and devices. Examples of computer communications include texting, picture messaging, video chatting, and wireless internet access. Networks connect computers to allow sharing of hardware, data, software and more. Common network types include local area networks (LANs), wide area networks (WANs), and wireless networks. The document also examines networking standards, topologies, and communications devices like modems, routers, and switches that allow data transfer between connected computers and networks.
This chapter discusses computer communications and networks. It describes the components needed for successful communications, including sending/receiving devices, communications devices, communications channels, and transmission media. The chapter discusses uses of computer communications like the internet, email, and collaboration software. It describes different types of networks including LANs, WANs, client/server networks, and peer-to-peer networks. Standards like TCP/IP, Ethernet, and wireless technologies are also covered. The chapter concludes with sections on communications software, devices, and setting up home networks.
Chapter 08 communication and network cscHisyam Rosly
This document discusses objectives for a chapter on computer communications. It covers topics like describing uses of computer communications including wireless messaging services and wireless internet access points. It also covers differentiating between types of networks like LANs, MANs, and WANs. Additionally, it addresses explaining the purpose of communications software and describing various types of lines for communications over the telephone network.
This document provides an overview of chapter 7 from the textbook Discovering Computers 2008. The chapter discusses computer communications and networks. It describes the components needed for successful communications including sending/receiving devices, communications devices, and transmission media. The chapter also covers network architectures like client/server and peer-to-peer, topologies like bus and star, standards such as TCP/IP and Wi-Fi, and transmission media including physical cables and wireless options. Uses of communications technology and common devices are also outlined.
The latest development in network and communicationMuhd Airil
This document defines and describes various types of computer networks and communication technologies. It begins by defining a computer network as a collection of interconnected devices that allows sharing of resources and information. It then discusses mobile computing and specifies the features of mobile devices like smartphones. The document also describes Internet technologies like VoIP and blogs. It explains different network types such as PAN, VPN, WLAN, and WiMAX. It concludes that computer networks have greatly benefited various fields by connecting people worldwide.
Peer To Peer Content Sharing On Wi-Fi Network For Smart PhonesIOSR Journals
This document summarizes a research paper on peer-to-peer content sharing on Wi-Fi networks for smart phones. It discusses using a peer-to-peer model to allow smart phones to share content like videos and photos over Wi-Fi networks without using cellular data or requiring a central server. The proposed system would allow phones to discover each other on the local network, search for files, and download content directly from other peers. This approach aims to reduce costs and bandwidth usage compared to uploading content through cellular networks or wired connections.
This document provides an introduction to cloud computing, including its key concepts, layers and types, enabling technologies, features, challenges, and future directions. It describes cloud computing as a new style of computing that provides dynamically scalable virtual resources as services over the Internet. The document outlines the infrastructure as a service (IaaS), platform as a service (PaaS), and software as a service (SaaS) layers and types of cloud computing. It also discusses technologies like virtualization, web services, service flows, and Web 2.0 that enabled cloud computing. Features of cloud computing include scalability, user-centric interfaces, quality of service guarantees, and pricing based on usage rather than large up-front costs.
The document provides information about Cisco certifications including the CCNA exam requirements and benefits, describes common networking devices like hubs, switches, routers and their functions, and explains basic networking concepts such as topologies, protocols, and the layered OSI model which is important for understanding network communication. It covers a wide range of foundational networking topics in preparation for Cisco certification exams.
The document provides an overview of the key objectives covered in Chapter 2 of Discovering Computers 2012, which discusses the history and structure of the Internet, the World Wide Web, other Internet services like email and instant messaging, and the rules of netiquette. Some of the topics covered include the evolution of the Internet from ARPANET to broadband connections, IP addresses and domain names, browsers and searching the web, publishing web pages, e-commerce models, and guidelines for polite online behavior.
Management information system chapter 7 telecommuniications the internet and ...Leng Kimlieng
1. The document discusses telecommunications, internet, and wireless technology. It covers the principal components of telecommunications networks, key networking technologies, types of networks, and principal wireless technologies and standards.
2. Specific topics covered include local area networks, wide area networks, internet protocols, internet architecture, internet services like email and web browsing, wireless standards like Bluetooth and Wi-Fi, and mobile technologies like 3G and 4G networks.
3. The document provides information on key digital networking technologies like client/server computing and packet switching as well as transmission media, internet protocols, wireless standards, and mobile cellular systems.
1) The Internet originated in 1969 as ARPANET and has since evolved to include hundreds of millions of connected devices worldwide. It allows sharing of information between individuals and organizations.
2) An IP address uniquely identifies devices on the Internet, while domain names provide a text alternative. DNS servers translate domain names to IP addresses.
3) The World Wide Web is a collection of electronic documents accessed via the Internet using browsers like Internet Explorer or Chrome. Web pages have URLs and can include text, images, videos and other media.
DESIGN OF A WIRELESS COMMUNICATION SOFTWARE BETWEEN MULTIPLE CLIENTS AND A SI...edirin aphunu
Wireless communication cost reduction software provides a simple but sophisticated means of communications between individuals in an organization. Here we focus on both sides of the clients-server relationship using Java Programming Language. The client requests that some action be performed, and the server performs the action and responds to the clients. The clients will also be able to establish connection between themselves through the server itself. Java’s fundamental networking capabilities are declared by classes and interfaces of package java.net, through which Java offers stream-based communication that enable applications to view networking as streams of data.
Www ccnav5 net_ccna_1_chapter_1_v5_0_exam_answers_2014Đồng Quốc Vương
This document contains 21 multiple choice questions and answers from the CCNA 1 Chapter 1 v5.0 exam. The questions cover topics like internet connection types, network devices, security goals, and network congestion. Answers are provided for each question about concepts addressed in the CCNA curriculum.
The document discusses the CCNA certification exam which tests knowledge of networking concepts. The exam is 90 minutes long with 45-55 multiple choice and simulation questions. Candidates must score 849 points or higher to pass. Obtaining the CCNA provides peer validation for personal and potential employer benefits, as well as opportunities for career advancement.
This chapter discusses computer communications and networks. It describes the components needed for successful communications including sending and receiving devices and a communications channel. Some common uses of computer communications technology are email, instant messaging, video conferencing, and wireless messaging services. The chapter also discusses local and wide area networks, different network types including client/server and peer-to-peer, and networking standards such as Ethernet, TCP/IP, Wi-Fi, and Bluetooth. It describes communications software, connections over telephone networks like dial-up and DSL lines, and common communications devices.
This document provides an overview of networking concepts including data networks, networking devices, network interface cards, networking device icons, repeaters, hubs, bridges, workgroup switches, routers, network topologies, physical topologies, LANs, WANs, examples of data networks, wireless LAN organizations and standards, cellular topology for wireless, SANs, virtual private networks, bandwidth, measuring bandwidth, the OSI model, data flow through a network, LAN physical layer, Ethernet standards, straight-through and crossover cables, sources of noise on copper media, shielded twisted pair cable, coaxial cable, fiber optic cable, fiber optic connectors, fiber optic patch panels, cable specifications, Ethernet media connector requirements, L
[GE207] Session03: Digital Technology TrendsSukanya Ben
This document discusses several emerging digital technology trends, including:
- Internet of Things (IoT) which connects devices like vehicles and appliances to exchange data over networks. IoT is expected to grow exponentially with an estimated 1 trillion connected devices by 2025.
- Big data and machine learning which analyze large and complex datasets to uncover insights. Popular applications include social media, mobile, and sensor data from IoT devices.
- Cloud computing which provides on-demand access to computing resources and data storage over the internet. Cloud services include Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS).
- Other trends discussed include artificial intelligence, robot
[GE207] Session01: Introduction to Digital TechnologySukanya Ben
The document provides an introduction and history of digital technology and the internet. It defines digital technology and traces the evolution of computers from early machines to personal computers and mobile devices. It also outlines the history of the internet from its origins as ARPANET to the development of technologies like TCP/IP and the world wide web. Key events and innovations in digital storage, processors, and influential technologies are highlighted in timeline formats.
1) The document discusses the challenges of developing global information systems to support international business operations. It addresses factors like cultural differences, technical standards, and managing projects across multiple countries and regions.
2) Key challenges include agreeing on common requirements, introducing changes to business processes, and coordinating application development globally. The management solution is to define core processes, identify key systems, and evolve applications incrementally.
3) When developing international systems, companies must consider issues like platform standardization, connectivity infrastructure in different markets, and software localization. The goal is to balance global coordination with local flexibility.
This document discusses managing information systems projects in three chapters. It covers the objectives of project management, selecting and evaluating projects, assessing business value, and managing risks. Key points include using portfolio analysis to select projects, quantifying tangible and intangible benefits, and addressing change management and user resistance to ensure project success. Formal tools like Gantt charts and PERT charts help plan, monitor, and control projects.
The document provides information about building information systems. It discusses various topics related to systems development including the core activities in the systems development process (analysis, design, programming, testing, conversion, production and maintenance). It also describes different methodologies for modeling and designing systems, such as structured methodologies and object-oriented development. Finally, it discusses alternative methods for building information systems like prototyping and end-user development.
This document discusses business intelligence and analytics and how they support decision making. It defines business intelligence as the infrastructure for collecting and analyzing business data, including databases, data warehouses, and analytics tools. Business analytics are the tools and techniques used to analyze data, such as OLAP, statistics, and data mining. The document outlines the decision making process and different types of decisions made by senior managers, middle managers, and operational staff. It also discusses how business intelligence systems provide reports, dashboards, queries and other features to support different user groups in making decisions.
This document discusses knowledge management systems. It begins by outlining the objectives of the chapter, which are to understand the role of knowledge management in business, the types of systems used for enterprise-wide knowledge management, knowledge work systems, and the benefits of intelligent techniques. It then provides an overview of the major types of knowledge management systems, including enterprise-wide systems, knowledge work systems, and intelligent techniques. It also outlines the knowledge management value chain and discusses specific systems like enterprise content management systems.
MIS-CH10: e-Commerce: Digital Markets, Digital GoodsSukanya Ben
The document discusses the unique features of e-commerce, digital markets, and digital goods. It identifies eight unique features of the internet and web as a commercial medium: ubiquity, global reach, universal standards, richness, interactivity, information density, personalization/customization, and social technology. It also discusses how e-commerce has transformed marketing and business transactions.
MIS-CH9: Achieving Operational Excellence and Customer IntimacySukanya Ben
Enterprise applications like ERP, SCM, and CRM systems help businesses achieve operational excellence and customer intimacy through integrated software modules and a central database. They increase efficiency by enabling information to be shared across business processes. SCM systems coordinate planning, production, and logistics with suppliers. CRM systems capture customer data to help firms better understand customers and achieve customer intimacy. Both SCM and CRM systems aim to improve business value through metrics like reduced costs, improved service, and increased sales and profits.
The document discusses security challenges for information systems, including vulnerabilities from hackers, malware, and system flaws. It describes the need for organizations to implement security frameworks including policies, controls, identity management, auditing and disaster recovery planning to protect digital assets and comply with legal requirements. Specific tools mentioned for safeguarding information include identity management software, authentication methods like passwords and biometrics, and security profiles to restrict user access.
MIS-CH07: Telecommunications, the Internet, and Wireless TechnologySukanya Ben
This document provides an overview of key topics in telecommunications, networking, the internet, and wireless technologies. It discusses the components of telecommunications networks including clients, servers, interfaces, wiring, and devices. It also describes different types of networks like local area networks (LANs) and wide area networks (WANs). The document outlines internet architecture, addressing, and governance. It explains technologies like packet switching, TCP/IP protocols, and wireless transmission standards that enable digital communication over networks.
MIS-CH6: Foundation of BUsiness Intelligence: Databases & ISSukanya Ben
This document discusses databases and database management systems. It begins by outlining some of the problems with managing data in traditional file environments, including data redundancy, inconsistency, and lack of flexibility. It then describes how database management systems (DBMS) address these issues by providing a centralized data repository and controlling access. The document focuses on relational DBMS and how they represent data through tables with rows and columns. It also describes basic relational operations like select, join, and project that allow users to extract useful information from these databases.
MIS-CH05: IT Infrastructure and Emerging TechnologiesSukanya Ben
This document provides an overview of chapter 5 from a management information systems textbook. It discusses IT infrastructure and emerging technologies. The key topics covered include the components and evolution of IT infrastructure, trends in computer hardware and software platforms, and challenges of managing infrastructure. It also includes learning objectives, case studies, and figures illustrating concepts like Moore's law and the stages of infrastructure evolution.
MIS-CH04: Ethical and Social Issues in INformation SystemsSukanya Ben
This document contains sections from a textbook chapter on ethical and social issues in information systems. It discusses key topics like privacy, intellectual property, principles for ethical decision making, and challenges posed by new technologies. Specific sections cover content piracy on the web, data analysis techniques like profiling and relationship mining, monitoring employees in the workplace, and protecting privacy and intellectual property in the digital age.
MIS-CH01: Information Systems, Organization, and StrategySukanya Ben
1) The chapter discusses how information systems impact organizations and can be used to develop competitive strategies. It covers topics like how organizational features influence IS, the economic and behavioral impacts of IS on organizations, and models for competitive strategy like Porter's.
2) Key frameworks discussed include Porter's competitive forces model and how IS can support different generic strategies to deal with competition. The value chain model is also introduced.
3) The relationship between organizations and IS is complex and two-way, with many factors like management decisions, culture, and politics mediating their influence on one another.
MIS-CH02: Global e-Business and CollaborationSukanya Ben
This document discusses different types of information systems used in businesses. It covers transaction processing systems, management information systems, decision support systems, executive support systems, and enterprise applications. Enterprise applications include enterprise systems, supply chain management systems, customer relationship management systems, and knowledge management systems. These systems help businesses improve processes, support decision making at different levels of management, and link the entire enterprise.
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إضغ بين إيديكم من أقوى الملازم التي صممتها
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1. Chapter 9
Networks and Communications
Discovering
Computers 2012
Your Interactive Guide
to the Digital World
2. Objectives Overview
Discuss the purpose of the
List advantages of using a
components required for
Describe the uses of network, and differentiate
successful communications
computer communications among LANs, MANs, and
and identify various sending
WANs
and receiving devices
Differentiate between
client/server and peer-to- Differentiate among a star Describe the various
peer networks, and network, bus network, and network communications
describe how a P2P ring network standards
network works
See Page 459 Discovering Computers 2012: Chapter 9 2
for Detailed Objectives
3. Objectives Overview
Describe various types
Explain the purpose of Describe commonly
of lines for
communications used communications
communications over
software devices
the telephone network
Discuss different ways Describe various
to set up a home physical and wireless
network transmission media
See Page 459 Discovering Computers 2012: Chapter 9 3
for Detailed Objectives
4. Communications
• Computer communications describes a process in
which two or more computers or devices transfer
data, instructions, and information
Communications
Sending device Receiving device
channel
Page 460 Discovering Computers 2012: Chapter 9 4
6. Uses of Computer Communications
Blogs Chat rooms E-mail Fax
Instant
FTP Internet Newsgroups
messaging
Video
RSS VoIP Web
conferencing
Web 2.0 Web folders Wikis
Page 462 Discovering Computers 2012: Chapter 9 6
7. Uses of Computer Communications
• Users can send and receive wireless messages
using wireless messaging services
Pages 462 – 463 Discovering Computers 2012: Chapter 9 7
Figure 9-3
8. Uses of Computer Communications
Text messaging (SMS) allows users to send and receive short
text messages on a phone or other mobile device or computer
Picture messaging allows users to send pictures and sound files
Video messaging allows users to send short video clips
Wireless instant messaging allows wireless users to exchange
real-time messages with one or more other users
Pages 463 - 464 Discovering Computers 2012: Chapter 9 8
9. Uses of Computer Communications
• Wireless Internet access points allow people to connect
wirelessly to the Internet from home, work, school, and
in many public locations
Pages 464 – 465 Discovering Computers 2012: Chapter 9 9
Figure 9-4
10. Uses of Computer Communications
• A cybercafé is a coffeehouse, restaurant, or other
location that provides personal computers with
Internet access to its customers
Page 466 Discovering Computers 2012: Chapter 9 10
Figure 9-5
11. Uses of Computer Communications
• A global positioning system (GPS) is a navigation system
that consists of one or more earth-based receivers that
accept and analyze signals sent by satellites in order to
determine the GPS receiver’s geographic location
• GPS receivers are:
Built into Available as a
Available with
many mobile handheld
new vehicles
devices device
Page 466 Discovering Computers 2012: Chapter 9 11
13. Uses of Computer Communications
Groupware Voice mail
• Helps groups of people work • Allows someone to leave a
together on projects and voice message for one or
share information over a more people
network • Computer in voice mail
• Component of workgroup system converts an analog
computing voice message into digital
• Major feature is group form
scheduling • A voice mailbox is a storage
location on a hard disk in the
voice mail system
Page 467 Discovering Computers 2012: Chapter 9 13
14. Uses of Computer Communications
• Many programs provide a means to collaborate, or work
online, with other users connected to a server
• Collaboration software includes tools that enable users to
share documents via online meetings and communicate
with other connected users
Document
Online Web
management
meetings conferences
systems
Page 468 Discovering Computers 2012: Chapter 9 14
16. Uses of Computer Communications
• Web services enable
programmers to create
applications that
communicate with other
remote computers over
the Internet or on an
internal business network
• A mashup is a Web
application that combines
services from two or
more sources
Page 469 16
Figure 9-8 Discovering Computers 2012: Chapter 9
17. Networks
• A network is a collection of computers and
devices connected together via communications
devices and transmission media
• Advantages of a network include:
Facilitating Sharing Sharing data
communications hardware and information
Sharing Transferring
software funds
Pages 470 - 471 Discovering Computers 2012: Chapter 9 17
19. Networks
• A local area network
(LAN) is a network that
connects computers
and devices in a limited
geographical area
• A wireless LAN (WLAN)
is a LAN that uses no
physical wires
Page 472 19
Figures 9-10 – 9-11 Discovering Computers 2012: Chapter 9
20. Networks
• A metropolitan area network (MAN) connects
LANs in a metropolitan area
• A wide area network (WAN)
is a network that covers a
large geographical area
Page 473 Discovering Computers 2012: Chapter 9 20
Figure 9-12
21. Networks
• The design of computers, devices, and media on a
network is sometimes called the network architecture
Client/server network Peer-to-peer network
Pages 473 – 474 Discovering Computers 2012: Chapter 9 21
Figures 9-13 – 9-14
22. Networks
• P2P describes an Internet network on which users
access each other’s hard disks and exchange files
directly over the Internet
Page 475 Discovering Computers 2012: Chapter 9 22
Figure 9-15
23. Networks
• A network topology refers to the layout of the computers
and devices in a communications network
Star network Bus network Ring network
Pages 475 – 477 Discovering Computers 2012: Chapter 9 23
Figures 9-16 – 9-18
24. Networks
An intranet is an An extranet allows
internal network customers or
that uses Internet suppliers to access
technologies part of its intranet
Page 477 Discovering Computers 2012: Chapter 9 24
25. Network Communications Standards
Token
Ethernet TCP/IP Wi-Fi
ring
Bluetooth UWB IrDA RFID
WiMAX WAP
Page 477 Discovering Computers 2012: Chapter 9 25
26. Network Communications Standards
Ethernet is a network standard that specifies no computer
controls when data can be transmitted
The token ring standard specifies that computers and
devices on the network share or pass a special signal (token)
TCP/IP is a network standard that defines how messages are
routed from one end of a network to another
Page 478 Discovering Computers 2012: Chapter 9 26
28. Network Communications Standards
• Wi-Fi identifies any
network based on the
802.11 standard that
facilitates wireless
communication
• Sometimes referred to
as wireless Ethernet
Page 479 28
Discovering Computers 2012: Chapter 9
Figure 9-20
29. Network Communications Standards
• Bluetooth defines how two Bluetooth devices use short-
range radio waves to transmit data
• UWB (ultra-wideband) specifies how two UWB devices use
short-range radio waves to communicate at high speeds
• IrDA transmits data wirelessly via infrared (IR) light waves
• RFID uses radio signals to communicate with a tag placed in
or attached to an object, animal, or person
Pages 480 - 481 Discovering Computers 2012: Chapter 9 29
31. Network Communications Standards
Wireless Application
WiMAX (802.16)
Protocol (WAP)
• Developed by IEEE • Specifies how some mobile
• Towers can cover a 30-mile devices can display the
radius content of Internet services
• Two types are fixed • Web
wireless and mobile • E-mail
wireless • Chat rooms
• Provides wireless • Uses a client/server
broadband Internet access network
Page 482 Discovering Computers 2012: Chapter 9 31
32. Communications Software
• Communications software consists of programs
that:
Help users establish Manage the
a connection to transmission of
another computer data, instructions,
or network and information
Provide an
interface for users
to communicate
with one another
Page 482 Discovering Computers 2012: Chapter 9 32
33. Communications Over
the Telephone Network
• The public switched telephone network (PSTN) is
the worldwide telephone system
Pages 482 – 483 Discovering Computers 2012: Chapter 9 33
Figure 9-23
34. Communications Over
the Telephone Network
Dial-up Dedicated
ISDN line
lines line
T-carrier
DSL FTTP
line
ATM
Pages 483 - 485 Discovering Computers 2012: Chapter 9 34
36. Communications Over
the Telephone Network
• ADSL connections transmit data downstream at a
much faster rate than upstream
Page 484 Discovering Computers 2012: Chapter 9 36
Figure 9-25
37. Communications Devices
• A communications device is any type of hardware
capable of transmitting data, instructions, and
information between a sending device and a
receiving device
• A dial-up modem converts signals between analog
and digital
Page 485 Discovering Computers 2012: Chapter 9 37
38. Communications Devices
• A digital modem sends and receives data and
information to and from a digital line
DSL Cable
modem modem
Page 486 Discovering Computers 2012: Chapter 9 38
40. Communications Devices
• A wireless modem uses the cell phone network to
connect to the Internet wirelessly from a
notebook computer, a smart phone, or other
mobile device
Page 487 Discovering Computers 2012: Chapter 9 40
Figure 9-28
41. Communications Devices
• A network card enables
a computer or device to
access a network
• Available in a variety of
styles
• Wireless network cards
often have an antenna
Page 487 41
Discovering Computers 2012: Chapter 9
Figure 9-29
42. Communications Devices
• A wireless access point is a central communications
device that allows computers and devices to transfer data
wirelessly among themselves or to a wired network
Page 487 Discovering Computers 2012: Chapter 9 42
Figure 9-30
43. Communications Devices
• A router connects
multiple computers or
other routers together
and transmits data to its
correct destination on a
network
• Many are protected by
a hardware firewall
Page 488 43
Discovering Computers 2012: Chapter 9
Figure 9-31
44. Communications Devices
• A hub or switch connects several devices in a
network together
Pages 488 – 489 Discovering Computers 2012: Chapter 9 44
Figure 9-32
45. Home Networks
• Home networks provide computers with the
following capabilities:
Connect to the Share a single high- Access files and
Internet at the speed Internet programs on other Share peripherals
same time connection computers
Connect game
Play multiplayer Subscribe to and
consoles to the
games use VoIP
Internet
Page 489 Discovering Computers 2012: Chapter 9 45
46. Home Networks
• Types of wired home networks:
Ethernet Powerline cable
Phoneline
Page 489 Discovering Computers 2012: Chapter 9 46
48. Communications Channel
• The amount of data that
can travel over a
communications channel
sometimes is called the
bandwidth
• Latency is the time it takes a
signal to travel from one
location to another on a
network
• Transmission media carries
one or more signals
• Broadband media transmit
multiple signals
simultaneously
Page 491 48
Discovering Computers 2012: Chapter 9
Figure 9-34
52. Wireless Transmission Media
• Cellular radio is a form of broadcast radio that is
used widely for mobile communications
Pages 494 - 495 Discovering Computers 2012: Chapter 9 52
Figure 9-40
53. Wireless Transmission Media
• Microwaves are radio waves that provide a high-
speed signal transmission
Page 496 Discovering Computers 2012: Chapter 9 53
Figure 9-41
54. Wireless Transmission Media
• A communications
satellite is a space
station that receives
microwave signals from
an earth-based station,
amplifies it, and
broadcasts the signal
over a wide area
Page 496 54
Discovering Computers 2012: Chapter 9
Figure 9-42
55. Video: Got Your Video Right Here
CLICK TO START
Discovering Computers 2012: Chapter 9 55
56. Summary
Overview of
How to join
communications
computers into a
terminology and
network
applications
Various
communications
devices, media,
and procedures
Page 497 Discovering Computers 2012: Chapter 9 56
57. Chapter 9
Networks and Communications
Discovering
Computers 2012
Your Interactive Guide
to the Digital World
Chapter 9 Complete