Page 114 - Viva ICSE Computer Studies 8 : E-book

storing it on your computer, instead, you’re reading it from the e-mail service. POP works by
contacting your e-mail service and downloading all your new messages from it. Once they are
downloaded onto your PC, they are deleted from the e-mail service and hence can only be
accessed using the same computer. If you try to access your e-mail from a diff erent device, the
messages that have been previously downloaded won’t be available to you.

Computer Etiquette

Not all information available on the Internet is correct. We should always cross-check it with multiple
sources. We should be careful while downloading the information from the Internet.

Tech Terms

Personal Area Network (PAN): A type of wireless network

Wide Area Network (WAN): A type of network that connects computers across large distance

Local Area Network (LAN): A type of network that connects several computers within a confi ned
geographical area

Metropolitan Area Network (MAN): A type of network that is usually confi ned to a metropolitan
city
Wi-fi : A wireless fi delity

Modem: A data communication equipment that translates signals

Switch: A device that forwards data packets to their destination
Hub: A device that provides a common connection to all devices on LAN

Domain Name: A readable computer address that identifi es the location of a computer on the
Internet
Hyperlinks: The underlined or highlighted words in hypertext

Hypermedia: A higher version of hypertext that contains links not only to text but also to other
forms of information such as sounds, movies and pictures
Internet Service ProvideR (ISP): An organisation that sells the Internet subscriptions to the public

Internet: A technology for linking LANs into a huge global computer network
IP Address (Internet Protocol Address): The 32-bit address that identifi es the location of a
computer on the Internet

Website: A collection of web pages that usually consists of a home page and many related pages
along with hyperlinks
File Transfer Protocol (FTP): An Internet protocol which is used for uploading and downloading

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