단원 9 - 레슨 3

An email is a digital message sent over the Internet from one person or organization to another. It can include text, attachments like images or documents, and links to websites. Emails are sent through email systems, which use addresses to identify the sender and recipient. The message is delivered to the recipient’s inbox, where it can be read and responded to. Emails are commonly used for personal, business, and official communication because they are fast, convenient, and can be accessed from various devices like computers and smartphones.

The Internet is a global network that connects millions of computers and devices, allowing them to communicate with each other and share information. It enables users to access websites, send emails, watch videos, play games, and use various online services. The Internet relies on a system of servers, routers, and protocols to ensure that data travels efficiently between devices across the world. It has become an essential tool for communication, education, business, and entertainment, shaping modern life in countless ways.

Instant messaging (IM) is a type of communication that allows people to send and receive real-time text messages over the Internet. Unlike email, which may have delays in response, instant messaging enables immediate conversations between users. IM is commonly used on smartphones, computers, and other devices, often through apps or software like WhatsApp, Facebook Messenger, or Skype. Some instant messaging platforms also allow for voice or video calls, file sharing, and group chats, making it a versatile tool for both personal and professional communication.