Some Key Terms- The Internet and Web Design

1. Define the term- Protocol
Protocol is an agreed upon format for transmitting data between two devices. There are 4 things the protocol "determines", such as :
- what type of error which is checking to be used.
- the data compression method, if there is such.
-how the sending device gives an indication that it has already finished sending a message.
-how the receiving device will indicate that it has already recieved a message.
What are the following protocols used for?
-TCP/IP,http,smtp,FTP
*TCP- Is a protocol used for communication between computers.
*http- This is a protocol used for receiving as well as transmitting files,
*smtp- Stands for simple mail transmit protocol, its a protocol used for sending email messages.
*FTP- File Transfer Protocol, This is a communication protocol which commands the transfer of files from one computer to another via a network.
3. GUI stands for graphical user interface.. Before the GUI, the PARC User Interface was used.
4. Two methods of data transmission- serial and parallel.
Serial transmissions only use 2 wires for transmitting and receiving data, 1 wire for sending or receiving and even though data is going in one direction, the data is sent bit-by-bit.
As for...
A Parallel transmission uses a number of wires for data transmission. It is also much faster than serial and therefore 8 or even more wires are carrying data (which are parallel to each other)to its destination. The data is moved 'multi-bits' at a time.
5. Define the term “URL”. Explain the components that make up the URL.
URL is an internet address.It stands for Uniform Resource Locator
The components which make it up are:
-access protocol(http)
-domain name(www.blogger.com)
-(if wanted)path to a file or resource "residing" on that particular server(trade)
6.In the context of data transmission, what is “error detection”?
An error detection refers to a "class of techniques" which are able to detect garbles messages.
7.Name and explain one common method of error detection.
One of the methods of error detection is:
Checksum
It is one of the easiest error detections schemes where each message that gets transmitted is accompanied by a numerical value which is based on the number of 'set bits' in the message. The so called 'receiving station uses the same formula and applies it to the message to see whether or not the numerical value matches. If the numerical value does not, then the receiver can say that it is a garbled message.
8.What is HTML and explain why it is important
HTML is a markup language which is used to structure text as well as multimedia documents and it is also used to set up hypertext links between documents. It is used a lot on the Web.
HTML is important because it is literally the "backbone" of a web design and every webpage has an HTML. It defines the structure and layout of a 'Web document' . This is done by using a number of tags and attributes.