Week 6

Functions of Apache HTTP Web Server
The Three typical functions of Apache HTTP Web Server are:

• Develop and maintain an open source HTTP server for modern operating systems
  
• Provide robust, commercial-grade, featureful and free-available source code implementation of an HTTP Web server
  
• Provide a secure, efficient and extensible server that provides HTTP services with the current HTTP standards.

Comparison between Static and Dynamic Website
Static Website have content , images, and documents placed within the page itself, while dynamic website pull the content, text, images and documents from a database based on the location of the web page.
A static site generally means that content is posted and updated as new information becomes available or until next edition. A dynamic website interacts with a database and allows visitors to request information and have it displayed back to the client browser.
Dynamic websites are typically much more complex to write and require the developer to have a sound knowledge of a range of technologies, such as a scripting language (e.g. PHP or ASP), the web server environment (e.g. Apache or IIS) and a web database system (e.g. MySQL or MS Access).While static are simple based website for easy navigation.
The combination of the time and difficulty of development cause the cost of developing a dynamic website to considerably outweigh that of a static website.
Most simple dynamic sites take longer to develop than static sites. When writing pages for a static site, what you see is what you get. When writing pages for dynamic sites, the developer is writing a program that generates web pages based on a set of input values and reliant on a number of external entities, such as a web database and a collection of HTML templates.
Because of the simplicity of static websites, they are far less prone to errors. Dynamic tend to be more error prone due to:

• mistakes in the script used to generate a web page
  
• underlying database systems become unavailable
  
• web server configuration changes

References:

The Apache Software Foundation. Homepage.(2007).[Online]. Available from:http://www.apache.org/ [Accessed 04/11/07].

Hemmings, Tafa.(2005).The Difference between Static and Dynamic Website. [Online]. Insite.Available from:www.inasite.com/resources/article.asp?article-id=2 [Accessed 04/11/07].

Infinitimixedmedia.Homepage.(2007).What is the difference between Static and Dynamic Website. [Online].Available from:http://infinitimixedmedia.com/content/view/127/44/ [Accessed 04/11/07].

Week 5:Effective Groupwork

I think from the list the most important for my group work is No.9: Read the assignment question before starting any of this.
As a group we need to read what is the question and understand it before making any step to deliver the answer;to know what we are being ask for or to do, then we know what we are researching for,then come together later and hold meetings and see what we have collected altogether.The Question is the main key without it there can not be research or presentation,or meetings.

Week 4 Mobile Internet Devices

One advantage of using a mobile Internet device which are small, thin, and light to carry around for sending and retrieving email messages is that the user gets the freedom and flexibility to communicate with others over email and access information and conduct transactions anywhere at anytime. This is beneficial as the user gets to read and answer emails instantly.

The other advantage of emailing through a mobile device is that there is instant connectivity through a mobile which is faster than a dial-up connection in computers. The user has a device that offers more than one function from emailing to receiving calls thus saving the user the cost of buying a computer.

They do have their limitations as well, one of them being that they are small devices, thus they have small screens limiting the type of files and data transfer, and some site do not render properly on the screen.

The other disadvantage of these devices for emails is that they have a low battery life.

References:

Fix, Thought.(May 06,2007).How much Internet do you need? [Online].UltraMobileGeek. Available from:
http://www.ultramobilegeek.com/2007/05/how-much-mobile-internet-do-you-need.html [Accessed 20/10/07].

Ctitanic.(10/10/07).What do you prefer for your mobile Internet solution, a shrunken PC or a non-PC? [Online].Mobilitysite. Available from:
http://mobilitysite.com/?p=7494 [Accessed 20/10/07].

Week 3

IP ADDRESSES

IP "Internet protocol " address, is a numeric address that is translated into a domain name by a DNS. Each server is connected to the Internet is assigned a unique IP address, which is a set of 4 numbers between 0-255 separated by periods that specifies a location fro the TCP/IP protocol.
IP addresses for devices connected to the Internet are due to run shortly because of the current IPv4 which has been used for the past 20 years is facing a number of limitations that have risen due to recent massive growth and the development of new applications of the web. IPv4 uses 32 bit addressing scheme thus provide no fewer than 4.2 billion unique IP addresses which is not enough for the enormous demand.
To solve this massive time-bomb,IPv6 was created which extends the addressable space from 32bits to 128 bits addresses space and should deliver no fewer than 340 trillion*3 possible addresses,thus it will provide greater reliability and security allowing you to access specific devices.

Reference:

Patrizio, Andy.(May 11 2006).We're Running out of IP Addresses. [Online] .Internet News. Available from: http://www.internetnews.com/infra/article.php/3605501 [Accessed 12/10/07].

How the www.Google.com Search Engine Works and one Advantage and Disadvantage in this Method of Searching

b) Search Engine databases are selected and built by computer robot program called spiders. They crawl in the web in their hunt for pages linked to other sites. They find the pages for potential inclusion by following the links in the pages they already have in their database. After the spiders find pages, they pass them on to another computer program for ‘indexing’. This program identifies the text links and other content in the page and store it in the search engine database’s files so that the database can be searched by keyword and whatever more advanced approaches are offered, and the page will be found if your search matches its content and rank them in order with the best result at the top or most relevant.

ADVANTAGE- It is much better than other search engines at determining if a link is a true editorial citation or an artificial link.
It is more efficient in crawling than competing engines.

DISADVANTAGE- It covers a relatively small proportion of the static web pages. The indexes can be significantly out of date, they do not search, they generally do not search the vast numbers of pages in the invisible web and can fail to provide sophisticate search when the user has a specialised category or topic of search in mind.

C) The search engine I would prefer to use when searching the web is Yahoo, because unlike Google it gives information to a great extent, to the sub-heading hence being able to locate the site that covers the area which I was looking, and the same time I get to learn more information.

REFERENCES:

Sullivan, Danny.(Mar.14.2007).How search engines work. [Online]. Search Engine Watch.Available from:http://searchenginewatch.com/showPage.html?page=2168031 [Accessed 07/10/07].

Barlow, Linda.(updated 05/11/04).The spider’s apprentice.[Online]. Monash.Available from: http://www.monash.com/spidap3.html [Accessed 07/10/07].

Wall, Aaron.(2007).Search Engine History. [Online]. Search Engine History.Available from:
http://searchenginehistory.com/ [Accessed 07/10/07].

HOW THE www.Yahoo.com SEARCH ENGINE WORKS AND ONE ADVANTAGE AND DISADVANTAGE IN THIS METHOD OF SEARCHING

SEARCH ENGINE- It is a program that searches a document for specified keywords and return a list of the documents where the keywords were found. It works by sending out a spider to fetch as many documents as possible.


Yahoo is the web's oldest 'directory' where human editors organize web sites into categories.It has both human-edited directory and a spider based index provided by Google. Sponsored results are provided by overture and appear at the top of the results page and additional entries are presented at the bottom of the page whenever a next page is available. It classifies information under a series of major subject headings and then sub-dividing these into a more specific headings. The web sites that correspond to these headings are listed as appropriate in this directory structure.


ADVANTAGE- It is excellent and easy to navigate subject catalogue. The subject heading and sub-headings can be used to guide the user through vast amount of information until they find what they are looking for.


DISADVANTAGE- Directories are far more cost and time intensive to maintain due to lack of scalability and the necessary human input to create such list and periodically check the quality of the listed websites.
Unlike highly automated search engines, Directories are manually complied taxonomies of websites.

References:
Sullivan,Danny.(Mar.14.2007).How Search Engine works .[Online].Search Engine Watch. Available from:
http://searchenginewatch.com/showPage.html?page=2168031 [Accessed 07/10/07].

Barlow,Linda.(updated 05/11/04).The Spider's Apprentice. [Online]. Monash.Available from:
http://www.monash.com/spidap3.html [Accessed 07/10/07].

week1

THE DIFFERENCES AND SIMILARITIES BETWEEN BLOG AND PAPER DIARY

Blog is the short form of “Web Blog”. It is a personal space for expressing subjective opinion .It is like having your own website, a website that is like a diary (online-diary).
A Paper Diary is where one records ones day’s life and innermost thoughts; entries are of ones day, where a blog is a person thought on a particular subject.
A blog has a series of entries with the latest entry at the beginning rather than at the end as it would be in a paper diary.
In a Paper Diary secretive thoughts are shielded from others while in a blog it is intended to be read and commented by others.


THE DIFFERENCES AND SIMILARITIES BETWEEN A BLOG AND A WEB PAGE

A blog is a website that is like a log or journal. Blogging software is a great, lightweight content management system for website that allows one to focus on content rather than HTML.
Web page is a document on World Wide Web consisting of an HTML file and often hyperlinked to other documents on the web. They are tedious to create
A blog owner can choose the topics of entry on the blog and controls who can read and comment on these entries, while a web page is viewable by anyone connected to the internet who has web browser. It is also possible for a blog owner to create private entries which cannot be viewed by anyone else because the owner has complete control over what appears on their blog
A blog can be owned by just one person or small groups of people, while web page is to Companies for their customers.