The main advantages of email are listed below :
(i) Free delivery: Sending an e-mail is virtually free, outsicde the cost of Internet service. There is no need to buy a postage stamp to send a letter.
(ii) Global delivery : E-mail can be sent to nearly anywhere around the world, to any country.
(iii) Instant delivery : An e-mail can be instantly sent and reccived by the recipient over the Internet. (iv) File attachment : An e-mail can include one or more file attachments, allowing a person to send documents, pictures, or other files with an e-mail.
(v) Long-term storage : E-mails are stored electronically, which allows for storage and archival over long periods of time.
(vi) Environment friendly: Sending an e-mail does not require paper( Paperless), cardboard, or packing tape, conserving paper resources.

i) W3C stands for "World Wide Web Consortium." The W3C is an international community that includes a full-time staff, industry experts, and several member organizations. These groups work together to develop standards for the World Wide Web.
ii) The World Wide Web Consortium (W3C) is an international organization committed to improving the web. It is made up of several hundred member organizations from a variety of related IT industries.
iii) W3C sets standards for the World Wide Web (WWW) to facilitate better communication ability and cooperation among all web stakeholders.
iv) It was established in 1994 by the creator of the WWW, Tim Berners-Lee.

Two access methods of connecting to internet are,
(i) Indirect Access: This is most common method used in home and office networks. The device e-g. computer connects to a network using Ethernet or Wi-Fi and the network connects to the Internet using Asymmetric digital subscriber line ADSL(cable or fibre.)
(ii) Direct Access: This is most common method used when travelling. The device e.g. smart phone connects directly to the Internet using 3G/4G mobile networks or public Wi-Fi.

(i) Hotspot is a physical location where people can access the Internet.
(ii) Internet access over a wireless local area network(WLAN) by way of a router that then connects to an Internet service provider.
(iii) Hotspots utilize Wi-Fi technology, which allows electronic devices to connect to the Internet or exchange data wirelessly through radio waves.
(iv) Hotspots can be phone-based or free-standing. commercial or free to the public.

The Internet works by using a protocol called TCP/ IP. TCP/IP allows one computer to talk to another computer via the Internet through compiling packets of data and sending them to right location.