The document discusses network infrastructure for e-commerce. It covers topics like the components of the information superhighway including local on-ramps, backbone networks, and global distribution networks. It also discusses broadband technologies, definitions of the information superhighway, introduction to the I-Way, market forces influencing it, and components like telecom infrastructure, cable TV infrastructure, and wireless infrastructure. Finally, it covers internet as a network infrastructure, including computer network concepts, network device roles like hubs, switches and routers, and understanding client and server systems.
Computer networking involves linking two or more computers together to exchange information via wired or wireless connections. A network can be an intranet, internet, or local area network (LAN). The internet is a global system of interconnected computer networks that links millions of private, public, academic, business and government networks using various networking technologies to share a wide range of information and services. An intranet is a private computer network within an organization that uses internet standards and protocols to share company information among employees. A LAN connects computers within a small physical area like a home, office, or building. A personal area network connects devices like computers, phones and cameras within a few meters of an individual, using wired or wireless connections like USB cables or Bluetooth
This document discusses different types of internet connectivity. It describes gateway access, dial-up connection, leased connection, DSL, cable modem connection, and VSAT. Gateway access provides limited internet access through a local network. Dial-up uses modems to connect over phone lines. Leased connections offer dedicated, high-speed access. DSL and cable modems utilize existing phone and cable infrastructure. VSAT uses small satellite terminals for connectivity.
The document discusses the network infrastructure needed to support e-commerce. It describes how the internet evolved from a restricted military/research network in the 1960s-1990s to becoming a global commercial network by the mid-1990s. Electronic commerce requires an information superhighway infrastructure to transmit content over the internet. This infrastructure includes network interface cards, hubs, switches, gateways, set-top boxes, and wired/satellite internet connections. The information superhighway emerged as the basic network enabling all types of e-commerce by providing integrated voice, data, and video services.
Mobile internet connectivity (MIC) allows users to access the internet away from their local area network using technologies like GSM, GPRS, 3G, and public WiFi networks. It works using mobile telecommunications networks or public WiFi hotspots, with data transfer rates varying by technology. While portable, MIC has disadvantages like slower speeds, less availability of information on small screens, and higher costs compared to fixed internet connections.
This document discusses computer networks and networking concepts. It defines types of networks like local area networks (LANs), wide area networks (WANs), and enterprise networks. It also describes network fundamentals such as analog and digital signals, communications media like twisted-pair wire, coaxial cable and fiber optics. Network protocols like Ethernet and TCP/IP are explained. Applications of networks include discovery, communication, collaboration, e-learning/distance learning, and telecommuting. The Internet and how it connects to the World Wide Web is defined.
This document provides an overview of key topics related to computer networks that will be covered in Chapter 7, including defining what a computer network is, common networking applications such as the internet and cellular networks, characteristics of networks such as wired vs wireless and different topologies, how data is transmitted over networks, examples of networking media like twisted pair cable and wireless frequencies, common communication protocols and standards, and networking hardware devices. The chapter will cover networking concepts, technical issues, protocols, and hardware in detail.
The document provides an overview of SOHO networks, enterprise networks, client/server computing history, and telephone network structures. A SOHO network typically includes less than 10 PCs without servers and uses an inexpensive router to connect to the internet. An enterprise network is larger and more complex, connecting multiple locations with WAN links. Client/server computing emerged to allow shared resources like printers across networked PCs. Telephone networks evolved from direct connections between each phone to use centralized switches to enable connections on an as-needed basis.
Computer networking involves linking two or more computers together to exchange information via wired or wireless connections. A network can be an intranet, internet, or local area network (LAN). The internet is a global system of interconnected computer networks that links millions of private, public, academic, business and government networks using various networking technologies to share a wide range of information and services. An intranet is a private computer network within an organization that uses internet standards and protocols to share company information among employees. A LAN connects computers within a small physical area like a home, office, or building. A personal area network connects devices like computers, phones and cameras within a few meters of an individual, using wired or wireless connections like USB cables or Bluetooth
This document discusses different types of internet connectivity. It describes gateway access, dial-up connection, leased connection, DSL, cable modem connection, and VSAT. Gateway access provides limited internet access through a local network. Dial-up uses modems to connect over phone lines. Leased connections offer dedicated, high-speed access. DSL and cable modems utilize existing phone and cable infrastructure. VSAT uses small satellite terminals for connectivity.
The document discusses the network infrastructure needed to support e-commerce. It describes how the internet evolved from a restricted military/research network in the 1960s-1990s to becoming a global commercial network by the mid-1990s. Electronic commerce requires an information superhighway infrastructure to transmit content over the internet. This infrastructure includes network interface cards, hubs, switches, gateways, set-top boxes, and wired/satellite internet connections. The information superhighway emerged as the basic network enabling all types of e-commerce by providing integrated voice, data, and video services.
Mobile internet connectivity (MIC) allows users to access the internet away from their local area network using technologies like GSM, GPRS, 3G, and public WiFi networks. It works using mobile telecommunications networks or public WiFi hotspots, with data transfer rates varying by technology. While portable, MIC has disadvantages like slower speeds, less availability of information on small screens, and higher costs compared to fixed internet connections.
This document discusses computer networks and networking concepts. It defines types of networks like local area networks (LANs), wide area networks (WANs), and enterprise networks. It also describes network fundamentals such as analog and digital signals, communications media like twisted-pair wire, coaxial cable and fiber optics. Network protocols like Ethernet and TCP/IP are explained. Applications of networks include discovery, communication, collaboration, e-learning/distance learning, and telecommuting. The Internet and how it connects to the World Wide Web is defined.
This document provides an overview of key topics related to computer networks that will be covered in Chapter 7, including defining what a computer network is, common networking applications such as the internet and cellular networks, characteristics of networks such as wired vs wireless and different topologies, how data is transmitted over networks, examples of networking media like twisted pair cable and wireless frequencies, common communication protocols and standards, and networking hardware devices. The chapter will cover networking concepts, technical issues, protocols, and hardware in detail.
The document provides an overview of SOHO networks, enterprise networks, client/server computing history, and telephone network structures. A SOHO network typically includes less than 10 PCs without servers and uses an inexpensive router to connect to the internet. An enterprise network is larger and more complex, connecting multiple locations with WAN links. Client/server computing emerged to allow shared resources like printers across networked PCs. Telephone networks evolved from direct connections between each phone to use centralized switches to enable connections on an as-needed basis.
The document outlines the course content for a Small Office Home Office (SOHO) IT Network Setup course. The course covers topics such as network components, configurations, email and file sharing setup. It includes chapters on understanding networks, network components, terminologies, a SOHO network lab, and advanced Google search operators. Network abbreviations and concepts such as IP addressing, static versus dynamic IP, and private versus public IP are also defined.
This document provides an overview of internet and email. It begins by discussing the history of communication and how computer networks have enhanced communication methods. It defines computer networks and types of networks classified by geographical coverage, including local area networks (LANs), metropolitan area networks (MANs) and wide area networks (WANs). The document then defines the internet and how it is administered without central ownership. It discusses internet services like the world wide web, email, and how to access the internet through browsers and search engines. Finally, it covers topics like internet connectivity requirements, types of connections, and how to load websites and search for information online.
This document provides an overview of VDSL for triple play applications. It begins with definitions of VDSL and discusses its advantages over other DSL technologies in providing higher bandwidth over shorter distances. The document then examines the anatomy of a VDSL system, including the network topology, transmission environment, impairments like crosstalk and radio frequency interference, and requirements defined by standards. It explores how VDSL enables the delivery of integrated data, television and telephone services to both residential and business customers.
DSL - Digital Subscriber Line is a technical term that is used in many ways to describe a fixed fee of hybrid technical services packaged and delivered via your ISP, telecommunications provider for both commercial businesses and residential homes.
The document provides a detailed overview of ISP architecture and components. It discusses that an ISP uses various technologies like fiber optics, satellite, copper wire to provide internet access to customers. The key components of an ISP architecture include modems, remote access server, SMTP server, router, web server. It then describes different types of internet access provided by ISPs like dial-up, DSL, cable, wireless broadband, Wi-Fi, ISDN, and Ethernet. It concludes by explaining the basic process of how an ISP works to provide internet access by checking for static/dynamic IP addresses and routing data requests between the user and destination servers.
This document discusses the new information technology (IT) infrastructure including the Internet, connectivity standards, and technologies that support electronic commerce. It describes key components of the infrastructure like intranets, extranets, and the client-server model. Benefits of the Internet are outlined as well as potential problems with the new IT infrastructure around issues like connectivity, security, and organizational change.
This document discusses communication networks and their components. It describes the public switched telephone network and examples of telephone network configurations including dial-up and dedicated lines. It then covers different types of digital dedicated lines such as ISDN, DSL, FTTH/FTTB, T-carrier, and ATM lines. Various communication devices are also outlined including modems, network cards, wireless access points, hubs/switches, and routers. Finally, it discusses communication channels, transmission media such as twisted pair cable, coaxial cable and fiber optic cable.
ISDN is a circuit-switched telephone network that provides digital transmission of voice and data over copper wires, offering better voice quality than analog phones. A central office switch, located in a telephone company's central office, switches calls locally or to long-distance carriers through dedicated circuits. A LAN connects computers and printers within the same building using optical fiber to exchange data.
The document discusses various topics related to telecommunications, the internet, and wireless technology. It covers the convergence of telephone and computer networks through technologies like smartphones. It also describes broadband connections provided by telephone and cable companies at speeds of 1-15 Mbps. Finally, it notes that voice and data communication as well as internet access are increasingly taking place over broadband wireless platforms.
This document discusses computer networks and their components. It defines a network as allowing nodes to share resources through connections established using cable or wireless media. The main benefits of networks are file sharing, resource sharing like printers, increased storage capacity, and sharing an internet connection. Key devices for networks include network interface cards, wireless network interface cards, modems, hubs/switches, routers, and wireless access points. Different types of networks include personal area networks, local area networks, metropolitan area networks, and wide area networks.
This document provides an overview of computer networks and the internet. It defines what a computer network is and describes different types of networks including LANs, MANs, and WANs. It also discusses internet connections like DSL and wireless, and internet applications such as email, the world wide web, file transfer protocol, and e-commerce. The document is divided into chapters covering topics like network requirements, the internet, and how information is transmitted over the internet.
DSL modems connect computers or routers to DSL phone lines to access ADSL internet services. They use higher frequencies than voiceband modems to avoid interference. DSL modems have higher data speeds than voiceband modems and exchange data directly with the local DSLAM for internet access. Common issues with DSL connections can be solved by checking modem lights, connections, and performing basic troubleshooting steps like restarting equipment.
This document discusses different types of computer networks. It describes local area networks (LANs) that connect devices within a small geographic area like a home or office using technologies like Ethernet or WiFi. Wide area networks (WANs) are discussed as covering a larger geographic area using technologies like MPLS, ATM, or Frame Relay. The document also summarizes wireless networks including personal (PAN), local (LAN), and metropolitan/wide area networks. The Internet is introduced as a worldwide system of interconnected computer networks that allows users to access information from any computer.
This document discusses different methods for connecting to the Internet, including dial-up networking, ISDN, and ADSL. It also explains some key Internet concepts such as protocols, servers, IP addresses, and caching. TCP/IP is identified as the standard protocol for sending and receiving data over the Internet, breaking data into packets and reassembling it.
The document provides information about the history and development of the Internet. It discusses how the Internet began as a US military network called ARPANET in 1969 and expanded throughout the 1970s. It also describes how the creation of the World Wide Web in 1991 by Tim Berners-Lee led to widespread commercial and public use of the Internet. The document then gives an overview of Internet governance organizations and different types of Internet connections.
An ISP provides internet access and services to both residential and business subscribers. An ISP architect defines the overall structure and architecture of an ISP's infrastructure, network, services, and customer care system. There are different types of ISPs classified based on how they provide service, including dial-up, DSL, cable/fiber optic, Wi-Fi, and satellite. An ISP connects users to the internet through modems that modulate and demodulate data, and assigns IP addresses using DHCP to allow connection and identification of devices.
When you connect to the Internet, your computer becomes part of a network. The Internet is a global collection of networks that connect together through various infrastructure components like routers, servers, and protocols. It allows information to travel quickly between any two connected computers worldwide, making the complex system seamless to users. The domain name system (DNS) translates easy-to-remember names to computer-readable IP addresses, while protocols like HTTP define how computers communicate over the Internet. No single entity owns the Internet, rather it is a network of networks maintained through cooperation.
This document provides an overview of Internet service providers (ISPs), including their typical structure, types, connection options, and internal architecture. It explains that ISPs provide internet access to individuals and companies. It also describes the common components of an ISP's internal architecture, such as modems, remote access servers, SMTP and web servers, and routers.
DSL is a technology that provides high-speed internet access over ordinary copper telephone lines. It allows data transmission faster than traditional modems. There are different types of DSL including ADSL, VDSL, HDSL, and SDSL. ADSL provides higher download speeds than upload speeds, making it suitable for homes. VDSL and HDSL can provide higher speeds but over shorter distances. SDSL provides equal speeds upstream and downstream, making it more suitable for businesses that transmit large amounts of data in both directions.
This document provides an overview of Internet Service Providers (ISPs), including the types of ISPs, examples of ISPs, factors to consider when choosing an ISP, the services ISPs provide, and the types of connections and equipment used to connect to an ISP. It discusses how ISPs connect customers to other networks and examples like access ISPs, hosting ISPs, transit ISPs and free ISPs. It also summarizes the different connection types like wireless, mobile phones, hotspots, broadband, and satellite and the equipment like modems and satellite receivers used.
A computer network connects two or more computers to allow people to share files, peripherals, and communication. It requires at least two devices with network interface cards, a connection medium like cables, and network software. Networks can be local area networks within a building, metropolitan area networks within a city, or wide area networks combining multiple local networks over long distances using services like the internet. The internet itself is a worldwide system of interconnected computer networks that allows for communication services globally.
The document provides an overview of computer networks. It defines a computer network as an interconnection between two or more computing devices using wired or wireless media for resource sharing or communication. The document discusses different types of networks including personal area networks (PANs), local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). It also covers common network topologies like bus, star, ring, mesh, and tree. The document defines key networking concepts such as IP addresses, network classes, and differences between IPv4 and IPv6 addressing schemes.
The document outlines the course content for a Small Office Home Office (SOHO) IT Network Setup course. The course covers topics such as network components, configurations, email and file sharing setup. It includes chapters on understanding networks, network components, terminologies, a SOHO network lab, and advanced Google search operators. Network abbreviations and concepts such as IP addressing, static versus dynamic IP, and private versus public IP are also defined.
This document provides an overview of internet and email. It begins by discussing the history of communication and how computer networks have enhanced communication methods. It defines computer networks and types of networks classified by geographical coverage, including local area networks (LANs), metropolitan area networks (MANs) and wide area networks (WANs). The document then defines the internet and how it is administered without central ownership. It discusses internet services like the world wide web, email, and how to access the internet through browsers and search engines. Finally, it covers topics like internet connectivity requirements, types of connections, and how to load websites and search for information online.
This document provides an overview of VDSL for triple play applications. It begins with definitions of VDSL and discusses its advantages over other DSL technologies in providing higher bandwidth over shorter distances. The document then examines the anatomy of a VDSL system, including the network topology, transmission environment, impairments like crosstalk and radio frequency interference, and requirements defined by standards. It explores how VDSL enables the delivery of integrated data, television and telephone services to both residential and business customers.
DSL - Digital Subscriber Line is a technical term that is used in many ways to describe a fixed fee of hybrid technical services packaged and delivered via your ISP, telecommunications provider for both commercial businesses and residential homes.
The document provides a detailed overview of ISP architecture and components. It discusses that an ISP uses various technologies like fiber optics, satellite, copper wire to provide internet access to customers. The key components of an ISP architecture include modems, remote access server, SMTP server, router, web server. It then describes different types of internet access provided by ISPs like dial-up, DSL, cable, wireless broadband, Wi-Fi, ISDN, and Ethernet. It concludes by explaining the basic process of how an ISP works to provide internet access by checking for static/dynamic IP addresses and routing data requests between the user and destination servers.
This document discusses the new information technology (IT) infrastructure including the Internet, connectivity standards, and technologies that support electronic commerce. It describes key components of the infrastructure like intranets, extranets, and the client-server model. Benefits of the Internet are outlined as well as potential problems with the new IT infrastructure around issues like connectivity, security, and organizational change.
This document discusses communication networks and their components. It describes the public switched telephone network and examples of telephone network configurations including dial-up and dedicated lines. It then covers different types of digital dedicated lines such as ISDN, DSL, FTTH/FTTB, T-carrier, and ATM lines. Various communication devices are also outlined including modems, network cards, wireless access points, hubs/switches, and routers. Finally, it discusses communication channels, transmission media such as twisted pair cable, coaxial cable and fiber optic cable.
ISDN is a circuit-switched telephone network that provides digital transmission of voice and data over copper wires, offering better voice quality than analog phones. A central office switch, located in a telephone company's central office, switches calls locally or to long-distance carriers through dedicated circuits. A LAN connects computers and printers within the same building using optical fiber to exchange data.
The document discusses various topics related to telecommunications, the internet, and wireless technology. It covers the convergence of telephone and computer networks through technologies like smartphones. It also describes broadband connections provided by telephone and cable companies at speeds of 1-15 Mbps. Finally, it notes that voice and data communication as well as internet access are increasingly taking place over broadband wireless platforms.
This document discusses computer networks and their components. It defines a network as allowing nodes to share resources through connections established using cable or wireless media. The main benefits of networks are file sharing, resource sharing like printers, increased storage capacity, and sharing an internet connection. Key devices for networks include network interface cards, wireless network interface cards, modems, hubs/switches, routers, and wireless access points. Different types of networks include personal area networks, local area networks, metropolitan area networks, and wide area networks.
This document provides an overview of computer networks and the internet. It defines what a computer network is and describes different types of networks including LANs, MANs, and WANs. It also discusses internet connections like DSL and wireless, and internet applications such as email, the world wide web, file transfer protocol, and e-commerce. The document is divided into chapters covering topics like network requirements, the internet, and how information is transmitted over the internet.
DSL modems connect computers or routers to DSL phone lines to access ADSL internet services. They use higher frequencies than voiceband modems to avoid interference. DSL modems have higher data speeds than voiceband modems and exchange data directly with the local DSLAM for internet access. Common issues with DSL connections can be solved by checking modem lights, connections, and performing basic troubleshooting steps like restarting equipment.
This document discusses different types of computer networks. It describes local area networks (LANs) that connect devices within a small geographic area like a home or office using technologies like Ethernet or WiFi. Wide area networks (WANs) are discussed as covering a larger geographic area using technologies like MPLS, ATM, or Frame Relay. The document also summarizes wireless networks including personal (PAN), local (LAN), and metropolitan/wide area networks. The Internet is introduced as a worldwide system of interconnected computer networks that allows users to access information from any computer.
This document discusses different methods for connecting to the Internet, including dial-up networking, ISDN, and ADSL. It also explains some key Internet concepts such as protocols, servers, IP addresses, and caching. TCP/IP is identified as the standard protocol for sending and receiving data over the Internet, breaking data into packets and reassembling it.
The document provides information about the history and development of the Internet. It discusses how the Internet began as a US military network called ARPANET in 1969 and expanded throughout the 1970s. It also describes how the creation of the World Wide Web in 1991 by Tim Berners-Lee led to widespread commercial and public use of the Internet. The document then gives an overview of Internet governance organizations and different types of Internet connections.
An ISP provides internet access and services to both residential and business subscribers. An ISP architect defines the overall structure and architecture of an ISP's infrastructure, network, services, and customer care system. There are different types of ISPs classified based on how they provide service, including dial-up, DSL, cable/fiber optic, Wi-Fi, and satellite. An ISP connects users to the internet through modems that modulate and demodulate data, and assigns IP addresses using DHCP to allow connection and identification of devices.
When you connect to the Internet, your computer becomes part of a network. The Internet is a global collection of networks that connect together through various infrastructure components like routers, servers, and protocols. It allows information to travel quickly between any two connected computers worldwide, making the complex system seamless to users. The domain name system (DNS) translates easy-to-remember names to computer-readable IP addresses, while protocols like HTTP define how computers communicate over the Internet. No single entity owns the Internet, rather it is a network of networks maintained through cooperation.
This document provides an overview of Internet service providers (ISPs), including their typical structure, types, connection options, and internal architecture. It explains that ISPs provide internet access to individuals and companies. It also describes the common components of an ISP's internal architecture, such as modems, remote access servers, SMTP and web servers, and routers.
DSL is a technology that provides high-speed internet access over ordinary copper telephone lines. It allows data transmission faster than traditional modems. There are different types of DSL including ADSL, VDSL, HDSL, and SDSL. ADSL provides higher download speeds than upload speeds, making it suitable for homes. VDSL and HDSL can provide higher speeds but over shorter distances. SDSL provides equal speeds upstream and downstream, making it more suitable for businesses that transmit large amounts of data in both directions.
This document provides an overview of Internet Service Providers (ISPs), including the types of ISPs, examples of ISPs, factors to consider when choosing an ISP, the services ISPs provide, and the types of connections and equipment used to connect to an ISP. It discusses how ISPs connect customers to other networks and examples like access ISPs, hosting ISPs, transit ISPs and free ISPs. It also summarizes the different connection types like wireless, mobile phones, hotspots, broadband, and satellite and the equipment like modems and satellite receivers used.
A computer network connects two or more computers to allow people to share files, peripherals, and communication. It requires at least two devices with network interface cards, a connection medium like cables, and network software. Networks can be local area networks within a building, metropolitan area networks within a city, or wide area networks combining multiple local networks over long distances using services like the internet. The internet itself is a worldwide system of interconnected computer networks that allows for communication services globally.
The document provides an overview of computer networks. It defines a computer network as an interconnection between two or more computing devices using wired or wireless media for resource sharing or communication. The document discusses different types of networks including personal area networks (PANs), local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). It also covers common network topologies like bus, star, ring, mesh, and tree. The document defines key networking concepts such as IP addresses, network classes, and differences between IPv4 and IPv6 addressing schemes.
A network connects computers and devices together through communication devices and transmission media. A local area network (LAN) connects devices in a limited area like a home or office building. Networks provide advantages like speed, cost savings, security, resource sharing, email and centralized software management. However, networks also have disadvantages such as high setup costs, single point of failures, virus spreading and performance declines with increased traffic. Common network architectures include client-server, where servers provide services to clients, and peer-to-peer where devices connect directly to each other. Common network topologies are bus, ring and star, with stars being popular due to their ease of installation and maintenance. Standards like Ethernet, WiFi, Bluetooth, TCP/IP and
Computer networks can be classified based on their geographical span, interconnectivity, administration, and architecture. They range from personal area networks (PANs) covering 10 meters around a device, to local area networks (LANs) within a building, to metropolitan area networks (MANs) within a city, to wide area networks (WANs) spanning countries, to the largest network, the internet, which interconnects networks worldwide. Networks allow sharing of resources like printers and storage, as well as exchange of information via email, webpages, and other applications.
This document provides an overview of computer networks and the Internet. It defines a computer network as a collection of connected computing devices that share resources. The main advantages are sharing devices and files, communication capabilities, and centralized data backup. Challenges include high setup costs and risk of viruses or hacking. It describes common network models like client-server, and different types of networks by transmission range. The Internet is defined as a global network of networks using TCP/IP that links billions of devices worldwide. Key components that enable the Internet include backbone networks, ISPs, packet switching, and TCP and IP protocols.
The document provides an introduction to computer networks and the internet. It defines a network as any interconnected group capable of sharing information. The internet is described as a globally connected system facilitating worldwide communication through private, public, business, academic and government networks governed by agencies establishing universal protocols. The web uses browsers to view linked documents that make up its content. Computer networks can be used for information sharing, resource sharing, communication, education, entertainment and more. Types of internet services include dial-up, DSL, cable, satellite, 3G/4G. Hardware includes modems, hubs and routers. Networks can be personal, local, metropolitan or wide area. Benefits are global connectivity while open access, but drawbacks include
It is the interconnection of multiple devices, generally termed as Hosts connected using multiple paths for the purpose of sending receiving data or media. There are also multiple devices or mediums which helps in the communication between two different devices which are known as Network devices. Ex Router, Switch, Hub, Bridge. The layout pattern using which devices are interconnected is called network topology. Such as Bus, Star, Mesh, Ring, Daisy chain. Computer network, two or more computers that are connected with one another for the purpose of communicating data electronically. Besides physically connecting computer and communication devices, a network system serves the important function of establishing a cohesive architecture that allows a variety of equipment types to transfer information in a near seamless fashion. Two popular architectures are ISO Open Systems Interconnection OSI and IBM's Systems Network Architecture SNA . Aakash Rajput "Computer Networks: Basics" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-4 | Issue-4 , June 2020, URL: https://www.ijtsrd.com/papers/ijtsrd30940.pdf Paper Url :https://www.ijtsrd.com/computer-science/computer-network/30940/computer-networks-basics/aakash-rajput
This course introduces students to issues in IT infrastructu.docxchristalgrieg
This course introduces students to issues in IT infrastructure.The course will cover computer and system architecture, and communication networks:
Infrastructure architecture
Organizational structure
Security
Metrics
Capacity PlanningThe course also focuses on the best practices employed in IT Infrastructure management, resource estimating, compliance and business continuity.
Course Description
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IT INFRASTRUCTURE OVERVIEW
IT infrastructure - includes the hardware, software, and telecommunications equipment that, when combined, provide the underlying foundation to support the organization’s goalsClient/server networks, the Internet, and n-tier infrastructures are central to an organization’s IT infrastructureThe three primary components of any IT infrastructure include:
Client/server networks
Internet
N-tier infrastructures
Computer Networks:Arguably, the greatest advancement in technology and communication over the past 20 years has been the development and advancement of the “computer network”. From emailing a friend to on-line bill paying to downloading data off the Internet to e-commerce, networking has made our world much smaller and changed the way we communicate forever.
What is Network: a system containing any combination of computers, computer terminals, printers, audio or visual display devices, or telephones interconnected by telecommunication equipment or cables: used to transmit or receive information.
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The Network Diagram
The Internet
Other LANS
Firewall
Router
Fiber Optic Network Cable
Server
PC
Wireless Network
Wired Network
Switch
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I wanted to present this diagram to help the viewer visually understand how a computer network was set-up. I linked each component to the same text links throughout the project.
Some network appse-mailwebtext messagingremote loginP2P file sharingmulti-user network gamesstreaming stored video (YouTube, Hulu, Netflix)
voice over IP (e.g., Skype)real-time video conferencingsocial networkingsearch……
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Types of Networks
LAN Local Area Network
WAN Wide Area Network
MAN Metropolitan Area Network
PAN Personal Area Network
SAN Storage Area Network
GAN Global Area Network
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I used this slide as a Introduction to the different types of networks. I tried to let the graphics do the talking on this slide. I elaborated more on each network type on subsequent slides.
Local Area NetworkA Local Area Network spans a relatively small areaLANs are usually confined to one building or a group of buildings Data travel between network devices via network cablesThe most common type of Local Area Network is called Ethernet
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I kept the graphic the same as the previous graphic representing the Local Area Network in hopes of creating a degree familiarity. I also include some basic facts about it.
Wide Area NetworkA Wide Area Network exist over a large geographical area Data travels through telephone or cable lines across networks Usually requires a Mod ...
This document provides an overview of computer networking concepts. It defines a network as any collection of independent computers that communicate over a shared medium. The key types of networks discussed are LANs (local area networks connecting devices within a short distance), MANs (metropolitan area networks spanning a city), and WANs (wide area networks extending long distances using various communication lines). The document also outlines common networking devices, terminologies, and the needs and advantages that networks provide for resource sharing, communication, and accessing remote databases.
Telecommunication networks provide several business benefits for networked enterprises, including better communication, data distribution, instant transactions, a flexible workforce, and greater efficiency. As businesses become digital firms, they are able to develop digitally-enabled relationships and seamless information flow. Telecommunication networks are made up of various components including people, hardware, software, data, and network resources. Common network topologies used include star, ring, and bus networks. Businesses can leverage telecommunication networks and the internet to collaborate, provide customer support, engage in e-commerce, and realize cost savings. Intranets also allow internal information sharing and communication within an organization.
This document provides an overview of computer networks. It begins by discussing how computer networks have changed daily life through services like watching cable TV, using ATMs, emailing, and more. A network is defined as two or more connected autonomous computers. The goals of networking are sharing resources, improved communication, and reduced communication costs. Networks have senders, receivers, messages, transmission mediums, and protocols. Early networks included ARPANET and NSFNET. The internet evolved from these and allows globally connected services. Network topologies like star, bus, and types of devices like hubs, switches, and routers are also summarized.
The document discusses the Internet and computer networks. It begins by explaining how the Internet emerged from early experiments connecting computers. It then describes different types of computer networks including local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). It also discusses wireless networks like Wi-Fi and Bluetooth. The document then explains client-server networks and peer-to-peer networks. It provides details on topics like IP addressing, URLs, DNS hierarchy, and accessing the Internet via methods such as dial-up, broadband, and wireless. Finally, it briefly discusses web browsers and cyber ethics.
A computer network connects computers and devices together through communication devices and transmission media. Communication describes the transfer of data, instructions, and information between two or more computers or devices. There are several types of computer networks including local area networks (LANs) that connect devices in a limited geographic area like a home or office, metropolitan area networks (MANs) that connect LANs across a region like a city, and wide area networks (WANs) that span large geographic areas like countries. Networks can be used to share resources like printers and files, provide communication services, and allow access to information from any connected device. However, larger networks are more difficult to manage and viruses could potentially spread between connected systems.
This presentation contains and will let you know about the various types of network and devices which are being used in the daily life. These devices are used as per the requirements in Office, Educational Institution, etc. This will help you in learning easily.
Pixel Patrol: Galactic Defender
Concept: Players take control of a pixelated spaceship in a classic side-scrolling shooter. Defend the galaxy from waves of retro-inspired alien invaders. Collect power-ups, upgrade your ship, and challenge epic boss battles in a nostalgic arcade experience.
Time Warp Runner
Concept: In this retro-style endless runner, players navigate through various time periods, each with its own unique pixel art aesthetics and challenges. Jump, slide, and dodge obstacles to collect artifacts while avoiding temporal paradoxes.
Neo Cyber Samurai
Concept: Step into the neon-lit streets of a cyberpunk city as a pixelated samurai. Engage in fast-paced, combo-based sword fights with rogue AI, cyber-enhanced criminals, and futuristic foes. Upgrade your skills and armor as you progress through the dystopian world.
Retro Racer Revolution
Concept: Race through a series of pixelated tracks in classic arcade racing style. Customize your vintage car, compete against AI or friends in split-screen multiplayer, and collect power-ups to gain the upper hand. The game features an array of tracks inspired by different eras of gaming.
Mystery Mansion: Ghost Hunt
Concept: Explore a haunted mansion filled with pixelated ghosts and supernatural mysteries. As a paranormal investigator armed with retro-tech gadgets, you must uncover the secrets of the mansion while capturing or banishing the resident ghosts. Solve puzzles, gather clues, and survive jump scares.
This document provides an overview of networking fundamentals including defining computer networks, types of networks like peer-to-peer and client/server, local and wide area networks, network interface cards, physical components like cabling and devices, and network architectures like Ethernet and Token Ring. Key points covered include how networks allow file sharing, printing, and communication between devices, examples of networking media and common devices, and standards for networking protocols and architectures.
This document provides an overview of computer networks and the internet. It defines key network terms like network, internet protocols, and network architecture models like client-server and peer-to-peer. It also discusses common network devices, internet concepts, and how the world wide web works using protocols like HTTP and URLs. The document concludes with sections on internet etiquette and email operations and etiquette.
This document discusses networking concepts including network hardware, software, and reference models. It describes different types of networks like LAN, WAN, MAN, wireless networks, and home networks. It discusses network hardware components and network software including protocol hierarchies, design issues for layers, connection-oriented and connectionless services, and service primitives. The document also compares the OSI and TCP/IP reference models, describing the layers in each model and their functions.
A workshop hosted by the South African Journal of Science aimed at postgraduate students and early career researchers with little or no experience in writing and publishing journal articles.
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This presentation was provided by Steph Pollock of The American Psychological Association’s Journals Program, and Damita Snow, of The American Society of Civil Engineers (ASCE), for the initial session of NISO's 2024 Training Series "DEIA in the Scholarly Landscape." Session One: 'Setting Expectations: a DEIA Primer,' was held June 6, 2024.
Exploiting Artificial Intelligence for Empowering Researchers and Faculty, In...Dr. Vinod Kumar Kanvaria
Exploiting Artificial Intelligence for Empowering Researchers and Faculty,
International FDP on Fundamentals of Research in Social Sciences
at Integral University, Lucknow, 06.06.2024
By Dr. Vinod Kumar Kanvaria
Main Java[All of the Base Concepts}.docxadhitya5119
This is part 1 of my Java Learning Journey. This Contains Custom methods, classes, constructors, packages, multithreading , try- catch block, finally block and more.
Executive Directors Chat Leveraging AI for Diversity, Equity, and InclusionTechSoup
Let’s explore the intersection of technology and equity in the final session of our DEI series. Discover how AI tools, like ChatGPT, can be used to support and enhance your nonprofit's DEI initiatives. Participants will gain insights into practical AI applications and get tips for leveraging technology to advance their DEI goals.
Strategies for Effective Upskilling is a presentation by Chinwendu Peace in a Your Skill Boost Masterclass organisation by the Excellence Foundation for South Sudan on 08th and 09th June 2024 from 1 PM to 3 PM on each day.
How to Manage Your Lost Opportunities in Odoo 17 CRMCeline George
Odoo 17 CRM allows us to track why we lose sales opportunities with "Lost Reasons." This helps analyze our sales process and identify areas for improvement. Here's how to configure lost reasons in Odoo 17 CRM
How to Build a Module in Odoo 17 Using the Scaffold MethodCeline George
Odoo provides an option for creating a module by using a single line command. By using this command the user can make a whole structure of a module. It is very easy for a beginner to make a module. There is no need to make each file manually. This slide will show how to create a module using the scaffold method.
2. COURSE OUTLINE
▪ Introduction to information superhighway,
▪ Components of the I-way,
▪ Internet as network infrastructure, TCP/IP Protocol suite,
Intranet, Extranet etc.
▪ Software agents (static and dynamic),
▪ Broadband technologies (xDSL, Wi-Fi, WAN).
3. Broadband ?
▪ A high-capacity transmission technique using a wide range of
frequencies, which enables a large number of messages to be
communicated simultaneously.
▪ Broadband commonly refers to Internet access via a variety of
high-speed wired and wireless networks, including cable, DSL,
FiOS(Fiber Optic Strands), Wi-Fi, WiMAX, 3G, 4G and satellite,
all of which are faster than earlier analog dial-up by a huge
magnitude.
4. I-Way: Definition
▪ Information Superhighway is a high-speed global communications
network that can carry data, voice, video and other services around the
world using technology such as the satellite, optical fiber and cellular
telecommunications.
▪ Basically, the term I-way describes a high-capacity (broadband),
interactive (two-way) electronic pipeline to the home or office that is
capable of simultaneously supporting a large number of electronic
commerce applications and providing interactive connectivity between
users and services and between users and other users.
▪ It is envisioned to provide very high speed access to information in all
forms (text, graphics, audio, video) via a wired or wireless connection.
5. Introduction to I-Way
▪ The information superhighway is a term coined by American Vice
President Albert Gore when giving a speech on January 11, 1994
describing the future of computers accessing and communicating
over a world-wide network.
▪ In simple words, it is the global information and communications
network that includes the Internet and other networks and switching
systems such as telephone networks, cable television networks, and
satellite communication networks used for e-commerce and many
more other purposes.
6. INTRODUCTION TO I-WAY
▪ The I-way has emerged as the basic network infrastructure for all types of E-
commerce activities due to its capability to provide integrated voice ,data and
video services .
▪ I-way has changed the way business advertises, market or sell their products
and services.
▪ A physical network, an infrastructure of modern high-speed that links
everyone at home or office to everything else.
▪ In practicality it is identical to internet provided -connections are broadband -
they are continuously running.
▪ As internet develops into I-way, changes will take place in infrastructure not
in internet.
7. Market Forces Influencing I-Way
▪ Users: becoming information publishers.
▪ Consumers, end users, or businesses: consuming information
about products/services.
▪ ISPs: commercial, government or private.
▪ Value added information providers: includes third party brokers,
intermediaries, originators of services who add value to services
provided by others.
8. Components of I-Way
Telecom-based
Infrastructure
Cable TV-based
Infrastructure
Wireless
Infrastructure
Commercial online
Infrastructure
Consumer/
Business
Premises
Equipment
Backbone
Communicat
ion and
Satellite
Networks
Network Access
Equipment Local on-Ramps
Global Information
Distribution Netwroks
9. Components of I-Way: Network access equipment
▪ This component of the I-way includes hardware and software
vendors, who provide physical devices such as routers and
switches, access devices such as computers and set-top boxes,
and software platforms such as browsers and operating systems.
▪Hardware and software vendors: who provide
▪ set-top boxes
▪ computers
▪ switches, hubs, routers
▪ software platforms such as browser operating systems
10. Components of I-Way: Local on-ramps or access roads
▪ Simplify linkages between businesses, schools, and homes to the
communications backbone.
▪ This component is often called the "last mile" in the telecommunications
industry.
▪ The providers of access ramps can be differentiated into four categories:
▪ telecom-based,
▪ cable TV—based,
▪ wireless-based, and
▪ computer-based on-line information services that include value-added
networks (VANs) like intranet of an enterprise.
11. Components of I-Way
LOCAL ON-RAMPS: Simplified
▪ connections linking home and personal networks with backbone
▪ requirement of huge investment
▪ also known as “last mile”
▪ divided into four categories:
▪ telecom based infrastructure
▪ cable tv-based infrastructure
▪ wireless infrastructure
▪ commercial online infrastructure
12. Components of I-Way:
Global information distribution network
▪ Represent the communication infrastructure crisscrossing countries
and continents. (i.e. long distance network)
▪ Most of the infrastructure for the I-way already exists in the vast
network of fiber optic strands, coaxial cables, radio waves, satellites,
and copper wires spanning the globe.
▪ Linking all the components of the I-way will require large capital
investments in "open" systems (interoperable equipment that uses
common standards) and installing gateways between various
networks.
▪ A final requirement is switching hardware and software to move huge
amounts of data effortlessly over such a complex network.
14. Internet as a Network Infrastructure
Computer Network Concept
▪Computer Network ?
▪Networks are built with a mix of computer hardware and
computer software.
▪A network connects computers, but can also connect
other devices such as shared printers, removable media
drives, scanners, and other equipment.
▪Networks enable people to share resources,
▪ Resources include printers, hard disks, and applications.
▪ Can greatly reduce the costs of providing these resources to
each person in a company.
15. Internet as a Network Infrastructure
Computer Network Concept
▪ Several terms are used to describe network devices
▪ hosts, nodes, workstations, peers, servers, and clients.
▪ A host (also known as "network host") is a computer or other device that
communicates with others on a network.
▪ Hosts on a network include clients and servers -- that send or receive data, services
or applications.
▪ Hosts typically do not include intermediary network devices
like switches and routers, which are instead often categorized as nodes.
▪ A node is also a broader term that includes anything connected to a
network, while a host requires an IP address.
▪ In other words, all hosts are nodes, but network nodes are not hosts unless
they require an IP address to function.
16. Internet as a Network Infrastructure
Computer Network Concept
▪ A typical network like the one in figure alongside
has three basic hardware components:
▪ one or more servers or host computers
(including microcomputers and mainframes),
▪ clients (PCs), and
▪ a circuit or network system, which is the path
over which they communicate.
17. Internet as a Network Infrastructure
Computer Network Concept
▪ In addition, servers and clients also need
special-purpose network software that enables
them to communicate.
▪ The server stores data and software that the
clients can access.
▪ Organization can have several servers working together
over the network with client computers to support the
business application.
▪ The client is the input–output hardware device at the user’s end of a
communication circuit.
▪ It provides users with access to the network, the data and software on the
server, and other shared resources.
18. Internet as a Network Infrastructure
Computer Network Concept
▪ In fact, now a days network does not need a computer designated
specifically as a server.
▪ Most modern client computers are designed to support the dual roles of both
client and server, sharing resources to the network and, at the same time,
accessing resources from the network.
▪ The circuit (cable plant or transmission media) is the pathway through
which the data or information travels.
▪ Traditional wired networks typically use copper wire, although fiber-optic
cable and wireless transmission hybrid systems are common.
▪ There are also devices in the circuit that perform special functions such
as hubs, switches, routers, bridges, and gateways.
19. Internet as a Network Infrastructure
Network Device Roles
▪ Figure alongside shows a small network
that has four client PCs and three
specialized server PCs connected by a
hub or switch and cables that make up
the circuit.
▪ In this network, messages move through
the hub to and from the computers.
▪ All computers share the same circuit and
take turns sending messages.
20. Internet as a Network Infrastructure
Network Device Roles: Hub and Switch
▪ Each computer, client, or server has a network adapter, or network interface
card (NIC).
▪ In the case of a wireless network, the network adapter sends and receives radio
frequency messages, not that different from a walkie-talkie or cell phone.
▪ The network adapter also determines the low level protocol used by the computer to
communicate on the network.
▪ Network adapters running on one protocol cannot communicate with network adapters
running on a different protocol.
▪ In older networks, hubs are used as central points where the cables leading out
to network PCs come together. A hub is simply a connection point that does not
provide any sophisticated control.
▪ In current networks, you are more likely to see a switch rather than a hub. From
the outside, both look much the same, but a switch is a more sophisticated
communication device that helps control and manage the data passing between
the PCs.
21. Internet as a Network Infrastructure
Network Device Roles: Router
▪ Figure above also shows a router. The router enables computers on one
network to communicate with computers on other networks, but at the
same time provide a level of isolation between the networks.
▪ Routers are a key part of the Internet, which is, at its core, a massive set
of interconnected networks.
▪ A gateway is used to connect dissimilar networks and devices. For
example, a gateway can be used to connect PCs on a LAN to a mainframe
computer.
▪ Like routers, bridges connect a network to other networks.
▪ Bridges do not provide the same level of isolation as routers, but can be
used in some situations where routers cannot be used.
▪ Another device, called a brouter, combines the functionality of a bridge
and router in the same device.
22. Internet as a Network Infrastructure
Understanding Client and Server
▪ Client/server describes the relationship between two computer programs
in which one program, the client, makes a service request to another
program, the server, which fulfills the request.
▪ The basic difference between clients and servers is the software that they
run.
▪ Clients, as you might guess, run a client operating system.
▪ Common client operating systems include Microsoft Windows 7/8/10, and
MacOS.
▪ Servers run either a server operating system or network operating
system.
▪ Common server OS include Windows Server systems such as Windows 2003
Server and Windows Server 2008, as well as most Linux versions.
▪ Either one enables the computer to act as a server, by running the software
necessary for central security management.