Answer: Option E. -> Designing
The Internet is a global network that connects millions of computer systems to facilitate communication and resource sharing. It is a combination of different technologies and protocols that enables users to access and share information. The Internet has a number of features that make it a powerful tool for communication and information exchange, including:

• E-mail: This is the most common way to communicate over the Internet. It allows users to send and receive electronic messages to and from anyone with an Internet connection.
• News Groups: Newsgroups are special discussion forums on the Internet where users can post and read messages about various topics.
• Chat: Chat is an interactive way of communicating over the Internet, usually in real-time. It allows users to send and receive messages instantly with other users.
• Google: Google is a search engine used to find information on the Internet. It is one of the most popular search engines and is used by millions of people every day.
• Designing: Designing is not a feature of the Internet. It is a process of creating graphics and layouts for websites, applications, and other digital products. It involves the use of graphic design software and other tools.

Answer: Option A. -> Protocol
In the context of the internet, a protocol is a set of rules and procedures that govern the exchange of data between devices connected to the internet. These protocols define the format, timing, sequencing, and error control for communication between networked devices. Some of the commonly used internet protocols are TCP/IP, HTTP, FTP, SMTP, POP, and IMAP.
Let's take a closer look at some of these protocols and their functions:

1. Transmission Control Protocol/Internet Protocol (TCP/IP): This is the foundation protocol of the internet, and it enables the transfer of data packets between devices. TCP handles the packaging, sequencing, and retransmission of data packets, while IP is responsible for addressing and routing.
2. Hypertext Transfer Protocol (HTTP): This protocol is used for the transfer of web pages and other resources on the World Wide Web. HTTP defines how web browsers and web servers communicate with each other.
3. File Transfer Protocol (FTP): This protocol is used for transferring files between computers on the internet. FTP provides a standard set of commands and responses for managing the transfer of files.
4. Simple Mail Transfer Protocol (SMTP): This protocol is used for the transfer of email messages between mail servers. SMTP defines how email messages are sent, received, and relayed.
5. Post Office Protocol (POP) and Internet Message Access Protocol (IMAP): These protocols are used for retrieving email messages from a mail server to a client device. POP and IMAP define how email clients interact with mail servers to retrieve email messages.

In summary, protocols are essential for the functioning of the internet as they provide a standard set of rules and procedures for communication between networked devices. Without protocols, devices on the internet would not be able to communicate with each other in a standardized and reliable manner.

Answer: Option D. -> token

Answer: Option B. -> home page

Answer: Option C. -> mailbox

Answer: Option D. -> @

Answer: Option A. -> subject

Answer: Option B. -> a type of conversation that takes place on a computer

Answer: Option C. -> writing a letter

Answer: Option C. -> Network server