Thursday 16 October 2008

Why IP addresses are due to run out shortly and propose what solutions have been put forward

Describe (using your own words) why IP addresses for devices connected to the Internet are due to run out shortly and propose what possible solutions have been put forward to address this massive ‘time-bomb’?
The IP addresses are due to run out, because in the last few years its users have been growing dramatically in huge numbers. Since technology is growing every single minute the users(we) are demanding more than the IP address can offer. Due to our huge demand and the growthe of technology the IP addresses are vulnerable to run out very recent.
The solution to the above is that to develop a new technology before it runs out. Some predict that the IP addresses will run out by 2010. As this factor concerned to many users, there has been the driving factor in creating and adopting several new technologies, including classful networks, CIDER addressing, Network Address Translation (NAT) and IPv6. However, as of 2008, IPv6 is generally seen as the only practical long-term solution for IPv4 address exhaustion that is readily available.
Reference:
DSL, Hosting and Co-Lo. (1999-2008). Running out of IP addresses. [21 October 2008]. [Online]. Available from: http://www.dslreports.com/forum/ Accessed: [21 October 2008].
Wikimedia Foundation, Inc., IPv4 address exhaustion. [Modified 17 October 2008].[Online]. Available from: http://en.wikipedia.org/wiki/Main_Page Accessed: [21 October 2008].

Tuesday 14 October 2008

How Yahoo and Google search engine works and what engin I prefer

Blog Questions for Week 2

There are three parts to this question:

a) Describe how the
www.Yahoo.com search engine works and give one advantage and one disadvantage in this method of searching?
b) Describe how the
www.Google.com search engine works and give one advantage and one disadvantage in this method of searching?
c) In your view explain which search engine you prefer to use when searching the web and justify why you have this preference?

You may find the following resources useful. Remember to reference all your sources properly in your Blog (using Harvard referencing).

1. How the Yahoo search engine works:
Yahoo search engine works like other search engine by searching a database of the full text of web pages automatically harvested from the billions of web pages out there residing on servers. It searches the web via search engine, and it is always searching a somewhat stale copy of the real web page.
In addition to excellent search results, you can use tabs above the search box on the yahoo home page to seek images, Yellow Page listings or use Yahoo’s excellent shopping search engines.
The search engine databases are selected and built by computer robot programs called spiders. These crawl the web, finding pages for potential inclusion by following the lines in pages they already have in their database. After the text had been put on the search engine it finds the relevant information and links.
Advantages:
It is easy to find information basically about any thing you want and be able to communicate with the vast majority of people. You can learn many things from the different webs how they gather their information and also you will be able to see pictures, watch video clips and so on.
Disadvantages:
It can make you lazy by depending on the Internet to even find materials for you course work. You will get lots of pages on the searched results you shouldn’t get. You might be tempted to view pages which are illegal, or misuse the net.

2. How does the google search engine work
The google search engine works by storing information about many web pages, and retrieve from the www itself. The pages are then retrieved by a web crawler or some times known as a spider. Google store all or part of the source page as well as information about the web pages. Google not only indexes and caches web pages but also takes snapshots of other file types, which include PDF, Word documents, Excel spreadsheets and much more.

Advantages.
It is a fantastic resent technology to play with and find huge information about anything if it exists on the Internet. You can find web pages, pictures, news, and so on. It is the easiest way of educating yourself on line where you don’t have to go long distance to get access to colleges and universities.

Disadvantages:
The page can display millions of pages which you do not need and it is time consuming to get the relevant information. When you are viewing pictures and video clips you might misuse the net and view pornography pictures or download hacking tools.


Reference:

Berkelay University of California. Home Page. (2008). How does search engine work?. [Online].[Last updated 27 January 08]. Available at:
http://www.lib.berkeley.edu Accessed: [14 October 2008].

Incisive Interactive Marketing LLC. (2008). Major search engines and directories.
Available from:
http://searchenginewatch.com Accessed: [14 October 2008].
Web search engine, Wikimedia Foundation, Inc., The search engine. [Online]. [Modified 9 October 2008].
Available from:
http://en.wikipedia.org Accessed [14 October 2008].