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                      1.   Explain any two types of protocols.



                      2.   What is the use of a web browser?

                      3.   What are the differences between a web client and a web server?



                      4.   Write any two applications of Internet.







                         Email


                 Electronic mail is the most popular and convenient way of sending and receiving messages through the Internet. It
                 takes no time to deliver a message in the inbox of any email service provider like Gmail, Yahoo, Outlook, Hotmail, etc.
                 Nowadays, it has become a cheap and an effective way to keep in touch with your family and friends. In an
                 organisation, there is no need to maintain the log of the official letter sent to different employees working at
                 different hierarchies manually.


                 Differences Between Postal Mail and Email

                 Following are some differences between postal mail and email:
                    • Postal mail is the traditional way of sending physical mail which takes a few days to deliver. Email is the fastest
                   way to send digital messages all across the world within a fraction of seconds.
                    • Postal mail is chargeable and the cost increases with the distance and the weight. If you are planning to send
                   some magazines, brochures, photo album, then, the cost will increase. In Email, we pay only for the Internet
                   with no extra cost of the email services. So, it is the cheapest way to send mail with bulky content. You can send
                   photos, audios, videos, animation, documents, etc. as an attachment easily.
                    • In postal mail, if you have to send the same letter to multiple recipients, then, it is an expensive process.
                   Through email we can send the same mail to multiple recipients by just writing the email address in cc or bcc with
                   no added cost.
                    • In postal mail, the recipient can receive a mail only at the marked geographical location using street number, locality,
                   city, pincode, etc. In email, it is a logical address that can be accessed from any computer and at any location all over
                   the world.


                 Advantages of Email
                 The following are the advantages of using email:
                    • Sending and receiving emails is a fast way of communicating as compared to the traditional mails.
                    • Emails can be sent anytime. That means it’s not restricted to only working days or working hours.

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