Computer Notes

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Unit 1: Networking   • Internet: World Wide Web, web servers, web clients, web sites, web pages, web browsers,  blogs, news groups, HTML, web address, e-mail address, downloading and uploading  files from a remote site. Internet protocols: TCP/IP, SMTP, POP3, HTTP, HTTPS.  Remote login and file transfer protocols: SSH, SFTP, FTP, SCP, TELNET, SMTP,  TCP/IP.   • Services available on the internet: information retrieval, locating sites using search  engines and finding people on the net;   • Web services: chat, email, video conferencing, e-Learning, e-Banking, eShopping, e Reservation, e-Governance, e-Groups, social networking.  • Mobile technologies: SMS, MMS, 3G, 4G.   Unit 2: HTML - II  • Embed audio and video in a HTML page.   • Create a table using the tags: table, tr, th, td, rowspan, colspan   • Links: significance of linking, anchor element (attributes: href, mailto), targets. ...

  Questions/Answers Question 1:  What do you mean by computer network? What is the purpose of creating network? Answer    : A computer network is a group of two or more computers that are connected with each other to share a resource. Sharing of devices and resources is the purpose of computer network. You can share printers, fax machines, scanners, network connection, local devices and other resources. Question 2: What advantages does fiber optics have over other media? Answer    : One major advantage of fiber optics is that it is less susceptible to electrical interference . It also support higher bandwidth, meaning more data can be transferred and received. Signal degrading is also very minimal over long distances. Question 3: Defines the terms:(i)Modem (ii)Guided media (iii)Network Transmission Media (iv)Twisted Pair Answer     : Modem:  Modem is a modulator and demodulator devices that converts data from analog to digital and digit...