Some Key Terms - The internet and web design

1. Protocol: An agreed-upon format for transmitting data between two devices. The protocol determines the following- the type of error checking to be used data compression method, if any and how the sending device will indicate that it has finished sending a message.

2.

TCP/IP- TCP is used for transmission of data from an application to the network. IP takes care of the communication with other computers. transmission control protcol - when data is chopped into packets and sent off. for sending packets and assembling. Internet

http- http is used for sending requests from a web client (a browser) to a web server, returning web content (web pages) from the server back to the client.

smtp- SMTP is used for transmission of e-mails.

pop- Post Office Protocol is used for downloading e-mails from an e-mail server to a personal computer.

FTP- File Transfer Protocol takes care of transmission of files between computers.

3. GUI: Graphical User Interface

4. Sequential transmission of signal elements of a group representing a character or other entity of data. Digital serial transmissions are bits sent over a single wire, frequency or optical path sequentially. Because it requires less signal processing and less chances for error than parallel transmission, the transfer rate of each individual path may be faster. parallel transmission is the simultaneous transmission of the signal elements of a character or other entity of data. In digital communications, parallel transmission is the simultaneous transmission of related signal elements over two or more separate paths.

5. URL: Abbreviation of Uniform Resource Locator (URL) it is the global address of documents and other resources on the World Wide Web. The first part of the URL is called a protocol identifier and it indicates what protocol to use, and the second part is called a resource name and it specifies the IP address or the domain name where the resource is located. The protocol identifier and the resource name are separated by a colon and two forward slashes.

6. Error Detection- Checking for errors in data transmission. A calculation based on the data being sent; the results of the calculation are sent along with the data. The receiver then performs the same calculation and compares its results with those sent.

7. Error Detection is important because the receiver detects an error, it can be corrected, or it can simply be reported. 

8. A parity bit is a bit that is appended to a bit stream to make the total number of "1" bits in a given set of bits always even or odd. Parity checks are the simplest error detecting system. For example, if we send some specific sequence of ones and zeros, and then count the number of ones that we sent and send an extra 1 if that count is odd (making the total now even) or an extra 0 if that count is already even, a single bit error can be detected: The reciever can count up the number of 1 bits they recieved, perform the same calculation, and if the result is not even, they will know that an error occured.

9. HTML-
HTML (Hyper-text Mark-up Language) is what formats web pages. It is used to formtat the text, layout, images, links, everthing that is seen on the page. Without HTML there would be no websites or pages.