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Showing posts with label internet. Show all posts
Showing posts with label internet. Show all posts

Phases of web hosting

2:03 PM kdhakal 12 comments
There are four main phases or sequences of hosting a website, which are discussed below:

  • Simple internet presence
           This is the most common and most basic type of website that is simplest to set up and least expensive as well. This type of website is a medium of direct communication of an website owner to the clients. It contains general information about the business firm, its objectives, missions, news, press releases, products and views, services, contact information etc. It may contain annual reports and specialized news bulletins, as well as a dedicated area for visitor feedback.


  • Basic E-commerce or E-business website

               This category of website is somewhat complex version of the simple internet presence website, complex to mean that it consists of much more information compared to the simple internet presence websites. It consists of a number of substantial enrichment features that provide extra functionality to the website. The extra features may consist of an online store of various goods and services with secure ordering capabilities, integrated online call centers, FAQs and fact sheets, etc.


 Advanced E-commerce or E-business website 
     
                   Advanced websites consist of increased functionality such as web based software and core applications to dynamic IP based systems and applications. Off-the-shelf and custom software applications can be integrated with enterprise websites to enhance various processes in a number of areas such as automated processes, general business applications, data management functions and automated software, private IP-based networks, etc.


    • Fully Integrated E-business web presence
               At this fourth stage of development, the firm or enterprise has become a fully integrated E-business with intranets, extra-nets and discrete enterprise system working together. The back-office and front-office functions work together as an integrated system for the ease of ordering, asset and inventories management, and knowledge management throughout the system. In this model, the institution has become a true E-business.




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    Types of computer networks

    3:14 PM kdhakal 0 comments
    On the basis of the area a network covers, it can be divided into the following types:

        *  LAN      -  Local Area Network
        *  WLAN  - Wireless Local Area Network
        *  MAN     - Metropolitan Area Network
        *  WAN     - Wide Area Network
        * SAN       -  Storage Area Network, System Area Network, Server Area Network, Small Area Network

        * CAN      - Campus Area Network, Controller Area Network, or sometimes Cluster Area Network
        * PAN      - Personal Area Network
        * DAN      - Desk Area Network


    The original categories of computer networks were only LAN, MAN and WAN. The other categories evolved during the advancements in the technology of computer networks.

    LAN (Local Area Network)

    A LAN is a network of computers and devices over a relatively short geographical area. An office building networked with computers,a school or college or a home usually contains a single LAN, though sometimes one building will contain a few small LANs (probably one per room), and occasionally a LAN will span a group of nearby buildings. In addition to operating in a limited space, LANs are also controlled by a single person or organization. A LAN also tend to use certain connectivity technologies, primarily Ethernet or Token Ring.

     WAN - Wide Area Network
    A WAN  spans a large physical distance compared to a LAN. The internet is the largest and the most common example of a WAN, that spans the whole Earth. A WAN can be considered as a collection of several LANs that are dispersed throughout the whole world. The network device Router connects several LANs to form the WAN. The Router also maintains both a LAN address and a WAN address in IP networking.

    WLAN  - Wireless Local Area Network
    WLAN is also a type of LAN(local area network) based on wireless network technology mostly referred as Wi-Fi. In contrast to a LAN, in WLAN no wires are used; radio signals are the medium for communication. To access any wireless network around, wireless network cards must be installed in the system. The wireless cards are connected to the Wireless Routers for the purpose of communication among the computers.




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    Computer Networks

    12:08 PM kdhakal 0 comments
    A computer network is a combination of computers and other computer related devices connected by communications channels for the purpose of sharing files and resources among the users. The network may be of many types, with unique features of its own.
    The primary objective of computer network is to share the files among various users. Among the various networks of computers, the internet is definitely the most important inventions of modern age. It is a huge source of information on any topic, it brought the era of emails and point to point communication through voice and video, allowing anyone to communicate with anyone else in the world; and it is also a great medium of new kind of business - the online business. Everyone in the world today depend so much on the computer networks and specially the internet, that it has become a part of our daily life.



    Computer Networks
    fig: Computer Networks
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    The Internet

    10:47 AM kdhakal 0 comments
    What is Internet?

    The internet is a chain of interconnected computer networks using the standard internet protocol suite (TCP/IP). This chain is comprised of web servers and client computers. Clients are computers that access this network through an internet connection. Web servers handle the actual web pages. Web servers have a bunch of web sites loaded waiting for clients to request them, which is done through browsers such as Internet Explorer, Firefox, Opera, etc.

    The Internet is a network of networks, spread over the whole globe. The foundations for the origin of the Internet were laid back in the 1960s when the United States funded research projects of its military agencies to build robust, fault-tolerant and distributed computer networks. Initially, the network was known as ARPANET, which later became the internet when its capacity was increased with the connection of more number of computers to the network.The Internet has no centralized governance in either technological implementation or policies for access and usage.


    The Internet
    fig: The Internet



    The most important component of the Internet is the Internet Protocol (IP), which provides addressing systems (IP addresses) for computers on the Internet. The IP address is a unique naming convention of each and every computers that are part of the Internet.

    The Internet has been serving everyone around the world, with every possible means. E-mail is an important communications service that is available on the Internet. The concept of sending electronic text messages among the people similar to the mailing letters or memos predates the creation of the Internet. File sharing helps to send and receive large sized files across the globe. The Internet has also enabled entirely new forms of social interaction, activities, and organizing, through social networking sites such as twitter, facebook, myspace, etc.







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