SESSION 2 : NETWORKING FUNDAMENTALS
What is a computer network ?
A computer network is a collection of computers and other hardware components interconnected by communication channels (cables or satellites) that allow sharing of resources and information.
What is WWW ?
World Wide Web (abbreviated as WWW or W3, commonly known as the Web), is a system of interlinked hypertext documents accessed via the Internet. With a web browser, one can view web pages that may contain text, images, videos, and other multimedia, and navigate between them via hyperlinks.
What is a Web Brower ? Give some examples
A Web Browser is a software used to view Web sites and acts as an interface between the user and the World Wide Web.
What is a web Server ? Give some examples
A Web server is a computer that stores web sites and their related files for viewing on the Internet. E.g IIS server.
What are the advantages of Computer Network ?
•Data Sharing: One of the most important uses of networking is to allow the sharing of data.
•Files Transfer : Users can send text files, spread sheets, documents, presentations, audio files, video files, etc. to other users. / Hardware Sharing: Hardware components such as printers, scanners, etc. can also be shared. For example, instead of purchasing 10 printers for each user, one printer can be purchased and shared among multiple users thus saving cost. / •Internet Access Sharing: You can purchase a single Internet connection and share it among other computers in a network instead of purchasing multiple Internet connection for each computer. This is very commonly found in Internet café (browsing centres), schools, colleges, companies, etc./ •Usage of network based applications: Such as web browsers, email clients, chat application, audio & video calling, etc. is another advantage.
Q. What is an ISP ?
An Internet service provider (ISP) is an organisation which provides you with access to the Internet via a dial-up (using modem) or direct (hard wired) or wireless connection.
Internet connections are provided by Internet Service Providers such as Bharat Sanchar Nigam Limited (BSNL), Airtel, MTS, Vodafone, Tata Docomo, JIO etc
Q Different types of Internet connectivity categorized into wired and wireless:
Wired Internet connectivity : Dial up, DSL, Cable Internet Access
Wireless Internet connectivity: 3G, wimax, Wi-Fi
Q What is DSL ?
Digital subscriber line(DSL) provides Internet access by transmitting digital data over wires of a local telephone network. DSL service is delivered along with wired telephone service on the same telephone line
What is wi-fi ?
Wi-Fi is a popular technology that allows an electronic device such as computers or mobile phones to exchange data wirelessly over a network, including high-speed Internet connections.
WiFi devices such as personal computer, smartphones, video game console, etc. can connect to a network resource such as Internet through a device called the Wireless Access Point (WAP).
What is WiMax ?
WiMAX: WiMAX (Worldwide Interoperability for Microwave Access) is a wireless communications standard designed to provide mobile broadband connectivity across cities and countries
What is 3G ?
3G: 3G, short for 3rd Generation is a set of standards used for mobile devices and mobile telecommunication services and networks. High-Speed Downlink Packet Access (HSDPA) is 3G mobile telephony communications protocol that allows higher data transfer speeds and capacity.
What is MODEM ?
MODEM Á modem is a device that converts digital computer signals into a form (analog signals) that can travel over phone lines. It also re-converts the analog signals back into digital signals. The word modem is derived from its function MOdulator/DEModulator.
Expand following terms :
LAN(local area network) / WAN(wide area network ) / PAN(personal area network) / MAN(metropolitan area network) P2P(PEER-TO-PEER) / MODEM (MOdulator/DEModulator) / ISP(Internet service provider) / DSL(Digital subscriber line) / WIMAX(Worldwide Interoperability for Microwave Access) / WIFI (Wireless Fidelity)/ WWW(World Wide Web) 3G ( 3rd Generation ) WAP(Wireless Access Point)
What is P2P network ?
Networks in which all computers have an equal status are called peer to peer networks.
What is a client server network ?
Networks in which certain computers have special dedicated tasks, providing services to other computers (in the network) are called client server networks. The computer(s) which provide services are called servers and the ones that use these services are called clients.