Some Key terms - The Internet and Web Design

Define the term – Protocol
Rules determining the format and transmission of data

What are the following protocols used for?

TCP/IP- Transmission Control Protocol/ Internet Protocol
http- hypertext transfer protocol
smtp- Simple Mail Transfer Protocol
FTP- file transfer protocol

A) What does GUI stand for? graphical user interface

b) What was used before GUI? Text was used before GUI

There are two methods of data transmission –

Serial - A form of data transmission in which the bits of each character are sent one at a time along a single communication path

Parallel- A form of data transmission in which the bits of each character are all sent simultaneously, resulting in extremely fast communication
Define the term “URL”. Explain the components that make up the url.
Uniform Resource Locator: an address of a web page, ftp site, audio stream or other Internet resource, e.g. http://en.wiktionary.org/.

6. In the context of data transmission, what is “error detection”?
Error detection is the ability to detect the presence of errors caused by noise or other impairments during transmission from the transmitter to the receiver

7.Name and explain one common method of error detection.
Automatic repeat-request (ARQ): The transmitter sends the data and also an error detection code, which the receiver uses to check for errors, and requests retransmission of erroneous data. In many cases, the request is implicit; the receiver sends an acknowledgement (ACK) of correctly received data, and the transmitter re-sends anything not acknowledged within a reasonable period of time

What is HTML and explain why it is important
HTML, an acronym for HyperText Markup Language, is the predominant markup language for web pages. It provides a means to describe the structure of text-based information in a document