Key Terms

1) Protocol- rules determining the format and transmission of data

2) TCP/IP(Internet Protocol Suite)- Set of communications protocols used for the internet and other similar networks.

HTTP(Hypertext Transfer Protocol)- A protocol to transfer hypertext requests and information between servers. It is an application-level protocol for distributed, collaborative, hypermedia information systems. Its use for retrieving inter-linked resources led to the establishment of the World Wide Web.

SMTP(Simple Mail Transfer Protocol)- The Internet standard protocol for transferring electronic mail messages from one computer to another. SMTP specifies how two mail systems interact and the format of control messages they exchange to transfer mail.

FTP(File Transfer Protocol)- A network protocol used to exchange and manipulate files over a TCP computer network, such as the internet. FTP is the simplest way to transfer files between computers. It is used to upload web page files from one computer to another.

3)GUI(Graphical User Interface)- An type of user interface which allows people to communicate with electronic devices (such as computers, mp3 players, portable media and gaming devices) through the use of images rather than just text and numbers.

4) There are two methods of data transmission:

Serial- Sends data one bit(binary digit) one at a time along a single communication path.

Parallel- sends the bits simulataneously, resulting in a fast communication speed, but does not work well over long distances.

5) URL(Uniform Resource Locator) - The internet website address.

6) Error detection is the way to detect errors caused by noise or impairments when transmitting data to the receiver.

7) A common method of error detection is checksum. A checksum of a message is an arithmetic sum of message code words of a certain word length, for example byte values, and their carry value. The sum is negated by means of ones-complement, and stored or transferred as an extra code word extending the message.
On the receiver side, a new checksum may be calculated from the extended message. If the new checksum is not 0, an error has been detected.

8) HTML(Hypertext Markup Language) is the most common markup language used for webpages. It designs the layout and structure of text-based information. It is important because it gives webpages their structure. Without it, information would be displayed as plain, with no layout at all.
Examples of HTML include :
BOLD
Italics
Underline
Strikeout

Pararaph

HTML is written in "tags" surrounded by angle brackets