Tuesday, April 30, 2013

Chapter 4 Readings – Components of E-mail Systems

Email has become the dominant way of communication between friends, businesses, co-workers, for advertising, and much more. In chapter 4 of the text, it discusses that the number of email messages sent daily far exceeds the number of parcels of paper mail handled by the postal system. The popularity of email can be attributed to the speed of delivery, relatively low cost of email, accessibility, convenience, and ease of management.

For an email to be delivered correctly, like a paper letter, you need to know the address of the recipient. An email address is comprised of two parts. The first part is the User ID which is a unique identifier and the second part is the host name. For example: someuser@somehost.com .
Now that you know the email address, how do you send it? Well you need an email client. An email client is a program that is used to create, send, and receive email messages. The email client connects to an email server that utilizes TCP/IP to transmit the message over the internet. The client utilizes a number of protocols such as POP, SMTP, IMAP, and HTTP.

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