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

Data Types

Querying A Database

What sort of information has the query selected?
The information that has been collected by the query is all my "contacts" that had the postcode 2145, was collected.

What sort of information has this second query selected?
The second query colled all postcode that were within my table with 2146, and highlited them to make it easier to see

The information collected within a query helps to enable the person who is updating/ maintaining the database, to be able to use a small amount of information to be able to locate all the persons within this criteria.

Database Definitions

Provide a basic definition for each of the following terms;

Field: somewhere (away from a studio or office or library or laboratory) where practical work is done or data is collected

Record: anything (such as a document or a phonograph record or a photograph) providing permanent evidence of or information about past events

File: a set of related records (either written or electronic) kept together

Query: Inquiries that are performed about transactions, databases, or other records

Database: A database is a structured collection of records or data that is stored in a computer system. The structure is achieved by organizing the data according to a database model.

Report: a written document describing the findings of some individual or group

DMBS:database management system: a software system that facilitates the creation and maintenance and use of an electronic database.

Database dictionary:A database that contains definitions of all data items defined during analysis.

Data type: a classification or category of various types of data, that states the possible values that can be taken, how they are stored, and what range of operations are allowed on them

Database Activity: The Yellow Pages

What is a database?

A database is a structured collection of records or data. A computer database relies upon software to organize the storage of data. en.wikipedia.org/wiki/Database

Examples of Databases

An example of a data base is:

* www.google.com.au

* www.yellowpages.com.au

* www.yahoo.com

Yellow Pages Challenges

1. I know there is a computer shop in the main street of Katoomba (Katoomba St.), but I don’t know its name. See if you can find the number for me.

Blue mountains business machines

99 KatoombaSt

Katoomba

NSW,

2780

Australia

ph: 02 4782 2333

1. Sally lives in Merrylands on Fowler Rd. and she wants to know the closest florist to where she lives. Help her out (see if you can get her a map).

M& A fresh cut flowers

91a Fowler Rd

Merrylands NSW

2160

ph: (02) 9892 1564

3. You want the phone numbers of some motels in Noosa QLD. But of course your phone book only has NSW numbers?

6 Hastings St Noosa Heads QLD 4567ph: (07) 5447 3077

4. Just for fun try the white pages and see if you can find a map of you or your friends house.\

Welcome

Heyy all and welcome to the beginging of my 2009 bloggs!!!!! This is the first of many IT posts!!!!


stay tuned

Jess